In this selection Ehrenreich is both outsider and insider; that is, she is the writer observing the environment in which she is playing a role. How does she make this narrative stance work

Why can this sentence be said to illustrate the indicative mood? insects are often harmful to farm crops. a. it states a condition contrary to fact. b. it makes a request or a demand. c. it expresses a statement of fact. d. it expresses a wish or a hope