Explanation:
As x approaches negative infinity, h(x) approaches positive infinity / negative infinity, which is an indeterminate form.
Therefore we use L'Hospital's Rule:
Derivative = 30x⁵ / 7x⁶ = 30 / (7x)
As x approaches negative infinity, 30 / (7x) approaches 0, and it comes from below because it is a rational graph with positive coefficient.
Hence the anewer is C.