Worried and unsure of how to get a good deal on his first car Marty asked his parents for advice. Which revision correctly punctuates the sentence? Question 3 options: a) Worried and unsure of how to get a good deal, on his first car Marty asked his parents for advice. b) Worried and unsure of how to get a good deal on his first car, Marty asked his parents for advice. c) Worried, and unsure of how to get a good deal on his first car, Marty asked his parents for advice. d) Worried and unsure, of how to get a good deal on his first car Marty asked his parents for advice.