I believe it’s B. Because pesticides aren’t really helping the environment.
To prevent increased circulation and itching, lotions should be gently but firmly patted on the skin, rather than rubbed in. Shake all lotions thoroughly immediately before application. Lotions are aqueous and are easily cleansed with water. Lotions are not oil based.
They are both highly selective,most of the time what binds to them. Think of it as a lock and key, if the key fits the lock and it turns then it does what it needs.