If marginal utility is rising, then total utility is also rising. true or false?

If marginal utility is falling, then total utility must be falling.
true or false?

Choose the statement that is incorrect. a. search activity occurs only in markets where there is a shortage. b. when a price is regulated and there is a shortage, search activity increases. c. the time spent looking for someone with whom to do business is called search activity. d. the opportunity cost of a good is equal to its price plus the value of the search time spent finding the good.