Boris is approaching his seventieth birthday. He suffers from a condition where his memories steadily deteriorate. He cannot recall major events in his life, such as the marriage of his son and his wife's death. Boris's symptoms are characteristic of:
a. Alzheimer's disease
b. post traumatic stress disorder
c. long-term memory
d. Parkinson's disease

I believe it is A.

Explanation    :

The most common symptoms of Alzheimer's disease are memory loss as well as confusion, which Boris has.

Hope it helps :)

hello,

question- which is one way that muslims scholars contributed to the scientific recolution?

answer- well you see in the religion islam the religion muslims practice there was the prophet muahmmed peace be upon him who did good things such as sit in a sertian posotion to use the toilet which then the scientist of this generation later found that it was good for you there are many more things like this.

important- if my answer was enough for you to understand mark me as brainliest you and have the best day ever!