Which verb agrees with its subject?

only some of the drama club members arrived.

a.
was

b.
has

c.
have

d.
is

You have been given an assignment to speak on the federal prison system in the u. s. which of the following sources is likely to be the least credible? a. an interview with an inmate of a federal prison b. the us department of justice “federal bureau of prisons” website: c. the website [] which discusses the danger of releasing an alarming number of convicts back into society d. an article from foxnews. com about the florida state penitentiary

Why is it important for students to establish some common values before beginning a discussion

Dogs make wonderful pets because they us stay happy and healthy. the topic sentence is "dogs make wonderful pets." , is this correct? i keep doubting myself.