Question

the expanse of ice looked enormous. in the sentence above, enormous has the same or almost the same meaning as: vast risky slick distant

Explanation:

"Enormous" means very large in size, quantity, or extent. "Vast" also implies great extent or area. "Risky" relates to danger, "slick" to smoothness or cleverness, and "distant" to far - away location. So "vast" is the closest in meaning.

Answer:

A. vast