Which sentence has an error in parallel structure? a) the teacher instructed students to cap their pens, close their test booklets and look up to the front of the classroom. b) william vowed that he would never again do the following things: drink to excess, smoke cigarettes, or use curse words. c) margaret could not believe that the corrupt cop wrote her a ticket, he spoke to her rudely, and he kicked her car tires as he left. d) in order to finish her project, meghan needed to paint the tri-board, staple her documents to it, and decorate it all with glitter.