Zoe planted a 4-foot oak tree in her backyard. The oak tree is expected to grow by 22 inches each year. If the oak tree grows at its expected rate, which of the following functions represents the height, H(x), in inches, of the oak tree after x years?

A.
H(x) = 22x + 48

B.
H(x) = 22x + 4

C.
H(x) = 48x + 22

D.
H(x) = 4x + 22