Consider the graphs of f(x) = {x} + 1 and g(x) = . The composite functions f(g(x)) and g(f(x)) are not
commutative, based on which observation?
a. The graphs of f(x) and g(x) intersect each other.
b. The graph of g(x) contains negative values.
c. The domains of f(x) and g(x) are different.
d. The y-intercepts of f(x) and g(x) are different.