The principle of specificity is a principle that is based on the observation that the body adapts or change accordingly the training is undertaken for physical fitness.
It simply states that the training should be relevant and appropriate to the physical activity to get the desired effect on the body. Given options are appropriate except option D which is not directly related to coordination with swimming activity.
There are a couple of risk lowering drugs you can take such as tamoxifen or raloxifene, or you can have a prophylactic mastectomy or a prophylactic oophorectomy.
