What is correct punctuation for An ear splitting cry came from the back of the grocery store

For english i have to find 4 errors in each diary post

Realism was a fairly influential and widespread literary movement in the united states in the latter half of the nineteenth century. which american writer is among the pioneers of american realism? a. ernest hemingway b. f. scott fitzgerald c. j. d. salinger d. mark twain

Which summary of a story about a ship crashing into an iceberg is the most subjective