Well generally it will be a positive impact (Of course this generally depends on what the "Physical activity" is, it is generally good, reason being while exercising causes the brain to release endorphin's, as well as helping relax muscles and relieve physical tension, which can greatly help with stress.
Nutrition is important when Reducing the risk of some diseases leading to overall health and well being, help maintaining body weight, supports normal growth, development and aging
I think it’s B
Hope that helped XD