To entertain, since this passage is entirely fictional and is not trying to convince you to do something or educate you.
Answer:
B
Explanation:
have to know a great deal more than they do now about the social and economical
Hey mate!
You stuck?
"Would," would be considered as a helping verb. Whereas action verbs, such as, run, would be considered the main verb.
{Helping verbs always appear before main verbs}
Hope this helps! :)