What is the BEST way to summarize paragraph 5?

Responses
A People are trying to make urban agriculture more popular in the U.S.People are trying to make urban agriculture more popular in the U.S.
B Urban agriculture is extremely unpopular and unsuccessful in the U.S.Urban agriculture is extremely unpopular and unsuccessful in the U.S.
C San Francisco's Food Bank is losing a lot of money to urban agriculture.San Francisco's Food Bank is losing a lot of money to urban agriculture.
D Urban agriculture is significantly more difficult and frustrating than most people first believe.

D Urban agriculture is significantly more difficult and frustrating than most people first believe.