What transformation occurs in the function compared to ?

Question

A

Shift 1 unit to the left, then stretch vertically by a factor of 2

B

Shift 1 unit to the right, then stretch vertically by a factor of 2

C

Shift 1 unit to the right, then compress vertically by a factor of

D

Shift 1 unit to the left, then compress vertically by a factor of