Which of the following describes the zeroes of the graph of f(x)=3x^6+30x^5+30x^5+75x^4?

a. -5 with a multiplicity 2 and 1/3 with a multiplicity 4

b. 5 with a multiplicity 2 and 1/3 with a multiplicity 4

c. -5 with a multiplicity 2 and 0 with a multiplicity 4

d. 5 with a multiplicity 2 and 0 with multiplicity 4