Answer: Option A
Step-by-step explanation:
The muscles that move the fingers and wrist are located in the forearm because this designing allows the hand to maintain strength and motor control with interfering the bulky muscles of the body.
If the configuration will be changed then the heavy muscles in the body will hinder in the movement of the bones.
The basic functions related to the movement of the hands for scratching, holding, et cetera will be hindered.