2. What does the author list in the text? A. the different definitions of cross-training B. the different athletes who do cross-training C. the different benefits of cross-training D. the different pieces of equipment used for cross-training 3. Read these sentences from the text. According to many fitness trainers, sticking with one activity, your body adapts to your exercise routine. Pretty soon your body thinks it has to have a four-mile daily run to survive. Eventually, no matter how much you run, your performance doesn't improve. To avoid such plateaus, you need to throw your body off its schedule by including other activities. Based on these sentences, what can you conclude about doing different kinds of physical activities in your exercise routine? A. It helps your body adapt to your routine. B. It makes your body think you have to do the activities to survive. C. It can help your performance in a sport improve. D. It makes your performance reach a plateau.​