Final answer:
The nurse will instruct the client to exercise the right arm before the left arm. Once the right arm is strong enough, exercises involving both arms simultaneously may be recommended. The drain should be removed before starting the exercises.
Therefore the correct answer is option B.
Step-by-step explanation:
The nurse will instruct the client to exercise the right arm before the left arm. This is because the woman has undergone a right mastectomy, so it is important to gradually regain strength and range of motion in the affected arm.
By starting with the right arm, the client can focus on rebuilding muscle tone and flexibility without putting excessive strain on the surgical site. Once the right arm is strong enough, the nurse may recommend incorporating exercises that involve both arms simultaneously to promote overall symmetry and balance.
It is also important to note that the drain should be removed before starting the exercises. This will ensure the client's comfort and minimize the risk of complications during the exercises.