The function p(x) is an odd degree polynomial with a negative leading coefficient. If q(x)=x^3+5x^2-9x-45, which statement is true?

A. As x approaches negative infinity, p(x) approaches positive infinity and q(x) approaches negative infinity.
B. As x approaches negative infinity, p(x) and q(x) approach positive infinity.
C. As x approaches negative infinity, p(x) and q(x) approach negative infinity.
D. As x approaches negative infinity, p(x) approaches negative infinity and q(x) approaches positive infinity.