One of the most daunting aspects of Alzheimer's Disease and other cognitive impairments of old age is that it becomes difficult for the affected person to communicate what they are experiencing or how their condition makes them feel. That is, while researchers are learning more and more about the disease, little is yet known about which of the following? a. symptoms
b. illness
c. genetics
d. treatment

u.s. presidents buried at arlington national cemetery include john f. kennedy and william howard taft. the kennedy gravesite is the final resting place not only of the former president, but also his wife jackie kennedy, his two brothers robert and edward kennedy, as well as a memorial to his brother joe jr.good luck

explanation:

uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs