Lobsters are plentiful and easy to catch in august but scarce and difficult to catch in november. In​ addition, vacationers shift the demand for lobsters further to the right in august than in any other month. Given this​ information, we know that​ _________ is/are higher in august than in other months.
a. Both supply and demand.
b. Only supply.
c. Neither supply nor demand.
d. Only demand.