Answer:
The best answer to the question: Changes in the immune system that accompany aging include:__, would be, D: T cells become less responsive to antigens.
Step-by-step explanation:
The immune system is vital for keeping us alive, as it is the one that will confront foreign organisms by attacking them when they try to invade our bodies. However, just like the human body ages, and its functions start to ebb with time, so does the systems; and the immune system is no different to this. Although it has been proven that the number of B and T lymphocytic cells does not decrease as a person ages, it has been shown that especially T cells become less responsive towards antigens, and if they do respond, then it is at a much slower pace than when a person is in their young-adult stage of life. This is why seniors can become sick much more often, and much more easily, than other adults, or even children.