A. Helping behavior would cease because the costs of helping would increase relative to the benefits of helping.
According to the sentence we can infer that the helping activity would increase and the benefits would not be as joyful as you want to.
D he tells them not to be silly children
The part of speech is conjunction.
<span>Because the rest of your doesn't seem to have been written here, I must assume the allusion you are referring to is </span>possibly from this line; Hamlet calls Polonius Jephthah, after the priest in the Old Testament who sacrifices his daughter to God. This allusion suggests <span>Polonius is sacrificing his daughter to trick Hamlet.</span>
You gotta show the passage...
