Which of the following could be an example of a function with a range (-∞,a] and a domain [b, ∞) where a < 0 and b < 0?
a. ƒ(x)= √(x-a)+b
b. ƒ(x)=3√(x-b)+a
c. ƒ(x)=-3√(x+a)-b
d. ƒ(x)=-√(x+b)-a