Select the letter of the solution that should be used:

I went for a long walk in the woods, and I went for a boat ride.
a. Add a comma.
b. Remove a comma.
c. Replace comma with another mark of punctuation.
d. No correction is needed.

a. Add a comma.

In the given sentence, the correct solution would be:

a. Add a comma.

The corrected sentence would be:

"I went for a long walk in the woods, and I went for a boat ride."