"Go with your grandma to her doctor to listen and take notes about her treatment options." This will mean you went for the sole cause of helping others improve their health.
As the question asks how can you offer assistance to enhance the overall health of others the correct answer would be B.
Going with your grandma to the doctor to listen and take notes about her treatment options will benefit her health. You are assisting her and helping her and this could make a big difference to her personal well being. If you asked your mom to add vegetables to the dinner for the benefit of everyone then that would be helping others health but as it is just for your benefit then it doesn't apply.
