Well i am not 100 percent sure but i think the answer is D.
Adaptive immunity can be acquired during either 'naturally' (by infection) or 'artificially' (through deliberate actions such as vaccination). Adaptive immunity can also be classified as 'active' or 'passive'
Answer: Provide two examples of loss that are common to many people. The various types of loss include death, divorce, disability, moving, and relationship breakups. Ceremonies help individuals cope with loss as they facilitate the grieving process.
Hope this helps......... Stay safe and have a Merry Christmas!!!!!!! :D