Can recipients with blood type A or B receive a blood transfusion from a type O donor?
No, because type O blood has both A and B antigens
Yes, because type O blood has both anti-A and anti-B antibodies
No, because type O blood has neither anti-A nor anti-B antibodies
Yes, because type O blood has neither A nor B antigens

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.

What is the source of tension in this excerpt? ellery searching everything insects filling the light fixtures ellery standing on the desks louise carpenter whispering

What is the speaker telling the grecian urn in these lines from “ode on a grecian urn”? he wishes the urn could talk so he could hear its stories. he knows the urn will still be around for others to see after he is dead. he fears that when he gets old, the urn will suffer because nobody else will take care of it. he wishes the people frozen on the urn could warm up and come to life.