Which sentence does not contain any errors in comma usage?
a. eating with your fingers can, certainly make things messy.
b. after i arrive at the park for soccer practice, i check to see how muddy the field is.
c. oh i love to hear her voice.
d. among all instruments, in the marching band, trumpets are usually loudest.

In a group discussion, which statement most clearly uses evidence to support a conclusion? a) the author makes some good points, but i feel that he’s ultimately biased. b) the author proves that he’s biased when he uses terms like “silly” and “stupid”. c) the author obviously hates the way fast food tastes, which is why he’s negative. d) the author first criticizes fast food, and then goes in to criticize junk food.