Older adults<span> become </span>more susceptible to infections<span> due to several factors. The combination of increased comorbid conditions and the decrease in activity of the immune system can make people </span>more prone to infections<span>.</span>
D: Faust. In the old German legend of Faust, the main character (Faust) makes a pact with the Devil.
In Shakespeare's play on Othello, the 1st Act introduces class and race as something very important by that time. Racism is rampant; Othello, being of black skin color and of different features compared to other men, was isolated and was regarded as 'barbaric'. However, Othello was a nobleman and a brilliant high-ranking soldier, thus, his social status was regarded as a very important factor to being respected.
I would say that it is C sarcasm
Unfortunately, it looks like you forgot the description.. :(