Read the sentences.

Jack wants to borrow my boots. He is going hiking in the mountains. I'm not sure they will fit him.

Which answer best combines the sentences into a compound-complex sentence?

Responses

Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.
Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.

Jack wants to borrow my boots to go hiking in the mountains, but I'm not sure they will fit him.
Jack wants to borrow my boots to go hiking in the mountains, but I'm not sure they will fit him.

Jack is going hiking in the mountains and wants to borrow my boots, but I'm not sure they will fit him.
Jack is going hiking in the mountains and wants to borrow my boots, but I'm not sure they will fit him.

I’m not sure that my boots that Jack wants to borrow to go hiking in the mountains will fit him.

Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.

The answer that best combines the sentences into a compound-complex sentence is:

Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.

To combine the sentences into a compound-complex sentence, we need to express both the reason for Jack wanting to borrow the boots and the speaker's uncertainty about the fit. Let's break down the given options:

Option 1: Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.

This option correctly combines the sentences into a compound-complex sentence. It starts with the reason (Because Jack is going hiking in the mountains) and includes both actions (he wants to borrow my boots) and the speaker's uncertainty (but I'm not sure they will fit him).

Option 2: Jack wants to borrow my boots to go hiking in the mountains, but I'm not sure they will fit him.

This option combines the sentences into a compound sentence. It includes both actions (Jack wants to borrow my boots to go hiking in the mountains) but does not include the speaker's uncertainty, making it less complete.

Option 3: Jack is going hiking in the mountains and wants to borrow my boots, but I'm not sure they will fit him.

This option combines the sentences into a compound sentence. It includes both actions (Jack is going hiking in the mountains and wants to borrow my boots) but does not include the speaker's uncertainty, making it less complete.

Option 4: I’m not sure that my boots that Jack wants to borrow to go hiking in the mountains will fit him.

This option does not combine the sentences into a compound-complex sentence. It simply rearranges the information and does not express both the reason and the uncertainty.

Therefore, the answer is:

Because Jack is going hiking in the mountains, he wants to borrow my boots, but I'm not sure they will fit him.