Answer:
A. the equilibrium quantity on a supply curve
There are two things that I can think of - alphabetize (by last names) and if the citation goes onto the second line it needs to be indented
The answer is B.
Go to You Tube and look up the "Preposition Song". It should be to the tune of Yankee Doodle. This video should help you remember the prepositions.
Have a great night/day!
-Dylan
