Which sentences have correctly placed commas? Select the two correct answers.

A. During the dig, the construction workers made sure to wear their safety gear.
B. My sister a trained bus driver, volunteered to drive us to the store.
C. Because, we forget our gloves we couldn't build, the snow fort outside.
D. I chose to adopt a Labrador puppy, my favorite type, from the shelter.
C. After, the lights were turned down the movie began.

A. During the dig, the construction workers made sure to wear their safety gear.

D. I chose to adopt a Labrador puppy, my favorite type, from the shelter.

The two sentences with correctly placed commas are:

A. During the dig, the construction workers made sure to wear their safety gear.

D. I chose to adopt a Labrador puppy, my favorite type, from the shelter.

To determine which sentences have correctly placed commas, we need to review the rules of comma usage.

1. Commas are used to separate items in a list, separate independent clauses in a compound sentence, and set off nonessential information.

Now let's analyze each sentence:

A. During the dig, the construction workers made sure to wear their safety gear.
This sentence is correct. The comma is used to separate the introductory phrase "During the dig" from the main clause.

B. My sister a trained bus driver, volunteered to drive us to the store.
This sentence is incorrect. The comma is incorrectly placed after "trained bus driver" instead of before it. The correct version would be "My sister, a trained bus driver, volunteered to drive us to the store."

C. Because, we forget our gloves we couldn't build, the snow fort outside.
This sentence is incorrect. The commas are incorrectly placed around "we forget our gloves." The correct version would be "Because we forgot our gloves, we couldn't build the snow fort outside."

D. I chose to adopt a Labrador puppy, my favorite type, from the shelter.
This sentence is correct. The commas are used to set off the nonessential information "my favorite type."

E. After, the lights were turned down the movie began.
This sentence is incorrect. The comma is incorrectly placed after "After" instead of before it. The correct version would be "After the lights were turned down, the movie began."

Therefore, the two correct answers are sentences A and D.