Which of the following sentences show the Correct usage of the word affect. Her speech really had an affect on me and made me want to volonteer. the affects of the medicine made it impossible for me to concentrate. I know my behavior is going to affect the group, so im trying to be possitive

I know my behavior is going to affect the group, so I'm trying to be positive

Explanation:

The word affect means to have an effect on something or someone.

It is most easily confused with the word 'effect' which means a change happening as a consequence of something.

The first two options would be correct if the word 'affect' is changed to 'effect' because the sentences are talking about a change occurring as a consequence or result of something.

Therefore, the correct answer is C because the narrator knows that his behaviour would have an effect on his group members.