Just find two nonfiction texts, after you read them, write down a list of benefits for each text. then just sum it all up in a few sentences and you're done.
A sentence fragment...
It does not sound right, therefore it is not complete (fragment). Run-on sentences are complete, yet they are extended to much.
The conjunction that bestfits the run-on sentence is
d. and
D
Because opportunity cost is a benefit profit or value that firm has to give up in order to achieve or have something else
I would go with D. band hope i helped