Answer: B. While both sides agree that processed foods are more convenient, the damage they do to a person's health should not be ignored.
"Finding common ground" means trying to find the areas in which both sides of a debate agree on. In this example, both sides on the debate on processed foods agree that this type of foods are more convenient. Finding common ground when addressing a counterclaim can ensure that both sides listen to the statement, instead of one side feeling alienated or ignored.
In a 1939 letter, John Steinbeck wrote that his goal for The Grapes of Wrath was “to rip a reader's nerves to rags.” Through the novel, Steinbeck wanted readers to experience the life of the Dust Bowl migrants with whom he had spent time.