Which sentence uses the past tense of to study correctly? a. mark is studying for his math test with margie. b. mark will study for his math test with margie. c. mark studied for his math test with margie.

The correct answer is C, "Mark studied for his math test with Margie"

Explanation: The past tense is used when you want to talk about an event that had already happened in the past. That being said, an conjugation of the verb STUDY is the following:

There we can see that the past of the verb Study is studied and for that reason, the only option that has it correctly is C.

they are all talking about chocolate (next time you post a question with "which" post the choices too)

direct object would be the answer