Which sentence in this passage represents a call to action?
This city has had a rodent problem for years. Uncollected trash in the alleys contributes to the problem. It provides a food source for
the rodents. The city needs to increase the number of trash collections,
A. It provides a food source for the rodents.
B. The city needs to increase the number of trash collections.
C. Uncollected trash in the alleys contributes to the problem.
D. This city has had a rodent problem for years.