Question

if you could dig one foot per minute, it would take you about six ______ to dig through the earths crust.
a. years
b. months
c. days
d. minutes

Explanation:

The Earth's crust has an average thickness. If digging at a rate of one foot per minute, we need to consider the magnitude of time. Months (B), days (C), and minutes (D) are too short - term for such a large - scale digging task (digging through the Earth's crust). Years (A) is a more reasonable time - scale considering the thickness of the Earth's crust and the slow digging rate.

Answer:

A. years