为自己加油

Choose the closest paraphrased version after the following sentence or the italicized part.

Assignments are thus felt to be given added weight by the passage of time.（ ）

A.
The less time is left, the more urgent the task becomes.
B.
The assignments will be increased with the time going by.
C.
The more time is spent, the more important the task becomes.
D.
The assignments will become more difficult with the time passing.