Maria baked three kinds of cookies as “pasalubong” to her nieces in the province. She has 24 pieces of butter cookies, 30 pieces of chocolate cookies and 42 pieces of peanut butter cookies. She wants to divide the cookies into identical containers so that each container has the same number of each kind of cookie. If she wants each container to have the greatest number of cookies possible, how many plastic containers does she need?

A. 2
B. 3
C. 6
D. 5​