Aresearch question must be all if the following except
a. focused
b. manageable
c. broad
d. researchable
e2020

C. broad

Explanation:

You do need a research question that you can manage, otherwise you research is going to go out o hand. If it needs to be manageable, it needs to be focused. Those two already contradict a broad question. Obviously, you need to be able to do the research in the first place.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."