Shown below is a board divided into 6 identical sectors, with a pointer that can be spun on it.

When the pointer is spun, it spins for some time and comes to a stop on a sector. The chances of it stopping on any sector are equal. Arif wants to colour some sectors green. How many sectors should he colour green so that the probability of the pointer stopping on a green sector is 1/3?

A. 1

B. 2

C. 3

D. 4