Which of the following is a complete sentence?
a. because i had not slept for two nights.
b. even when the temperatures improved.
c. since she was hungry, she had a snack.
d. although henry was unusually tall.

C. Since she was hungry, she had a snack.

Explanation:

For a sentence to be deemed fully complete, there should be a meaningful story within that sentence. The start and ending should be in tandem with each other.

The four options provided shows various sentences but only option (C) is a full sentence.

Option (A) is just half of a sentence given. It gives a reason but not the final story.

Option (B) is also wrong as it is just a subordinate clause with no result or solution to the sentence.

Option (D) is also an incomplete sentence as like the other three options, it gives just half of the sentence and nothing more.

Option (C) gives the start and end of the sentence. She got hungry so she had a snack. Since she was hungry, she had a snack.

this like a whole essay