PLEASE HELP, I'm trying to study for a quiz >.< and I don't understand this one question!

Question

A fellow student reports his measurements of time for a speed calculation in minutes. How could he express that calculation using SI base units?

A)convert minutes to hours and redo his calculation

B)keep his calculation as it is

C)convert minutes to seconds and redo his calculation

D)convert minutes to meters and redo his calculations

Answer 1

One second is the SI unit for time.
The answer is (C)