C). Never a good idea and should be avoided.
Price ceilings prevent a price from rising above a certain level. When a price ceiling is set below the equilibrium price, quantity demanded will exceed quantity supplied, and excess demand or shortages will result. Price floors prevent a price from falling below a certain level.
Answer:
d. Tension erupted in the room when it was revealed that the villian knew that the spy withheld information.
Explanation: The best revision of the sentence is answer d because is grammatically correct, the sentence is in past tense and that is why all the verbs should be in past tense. The word withholding is not in past tense, but the word withheld it is, that's why this answer is grammatically correct.
