Answer:
The final function is

A is correct
Explanation:
Given: Parent function

We need to apply sequence of transformation.
Step 1: Compress vertically by 1/2
If function compress vertically number multiply by factor

Step 2: Shift 2 unit left
For left and right shift change in horizontal.
For a unit change , x-> x+a

Step 3: Shift 1 unit down
For up and down change in y value or vertically shift.
For down subtract 1 unit from function

Please see the attachment for transformation step by step.
Hence, The final function is
