Find the domain and range of the function f(x) = 9x² - 4
A) Domain: All real numbers, Range: All real numbers greater than or equal to -4
B) Domain: All real numbers, Range: All real numbers greater than or equal to 0
C) Domain: All real numbers, Range: All real numbers
D) Domain: All real numbers, Range: All real numbers greater than or equal to -[infinity]
