"Mexicans Begin Jogging"

In the poem "Mexicans Begin Jogging", why does the speaker run when the immigration officers raid the factory where he works?

A.) He's not a legal U.S. citizen.

B.) He's terrified that his boss will fire him if he does not.

C.) He's afraid of his fellow workers finding out he's not an illegal like them.

D.) His boss tells him to run, and he is on his boss's time.

A.) He's not a legal U.S. citizen.