Question: An object initially at rest experiences a time-varying acceleration given by a = (2 m/s^3)t for t ≥ 0. How far does the object travel in the first 3 seconds?
A: 9 m
B: 12 m
C: 18 m
D: 24 m
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option.