what are the prepositions and the prepositions phrase and the word it modifies in the sentence “The students in my class were very excited about their projects”

What is the correct way of writing the following sentence? you’re headed for the big time kim said. a. “you’re headed for the big time,” kim said. b. your headed for the big time, kim said. c. you’re headed for the big time, kim said. d. “you’re headed for the big time” kim said