Cross-training is athletic training in sports other than the athlete's usual sport. The goal is improving overall performance. It takes advantage of the particular effectiveness of one training method to negate the shortcomings of another
C is going to be the best answer to this question.
I think they put flavoring in the liquid cartridges to make them more addictive. People are going to want the newer flavors because of the taste. Some people use them as coping skills or sometimes to be “trendy” or “cool”. E-cigarettes are very damaging to your lungs worse then regular cigarettes.
Groundwater dissolves the rock when it flows through