(shown in graph.)
two different functions are shown.

which statement best compares the two functions?

a.) the minimum of function a occurs 1 unit higher than the minimum of function b.

b.) the minimum of function a occurs 3 units higher than the minimum of function b.

c.) the minimum of function a occurs 5 units lower than the minimum of function b.

d.) the minimum of function a occurs 7 units lower than the minimum of function b.