To become an Olympic Swimmer is a hard and difficult path. Like sprinting in individual competitions, there is a win by margin. Swimming just wants a lot of commitment to hard-working training. In the Olympic Swimmer, there are lines like, "Train and Strain to be the best", "Traverse the lane in record time" and "Hard work wins the Olympic race", which verifies it undoubtedly. For that reasons, the answers are C and A respectively.