B. Lactic acid build up creates pains and aches on the muscles
It mean poor, not good, bad.
A. Marijuana alters you for the short time you are under the influence. It can cause anxiety, irritability, and sleep disturbances if, it is not a sativa. Sativa calms you and makes you not worry. It can also be B. because other marijuanas are meant to cause hyper activness.