Final answer:
The correct answers are A, B, and A.
Step-by-step explanation:
The correct answer to the first question is option A: I ate the sandwich, and I saved the chips for later. This sentence correctly uses the conjunction 'and' to connect two independent clauses. In option B, a comma is used incorrectly after 'and', which creates a comma splice and makes the sentence grammatically incorrect.
The correct answer to the second question is option B: Parts of North Carolina have mild winters; there is little snow. This sentence correctly uses a semicolon to connect two independent clauses. In option A, there is a run-on sentence with two independent clauses separated by a comma, which is incorrect.
The correct answer to the third question is option A: Mariah raises chickens in her backyard. She keeps them in two large coops. This sentence correctly uses a period to separate two independent clauses. In option B, a comma is used incorrectly after 'backyard', which creates a comma splice and makes the sentence grammatically incorrect.