The quantity of coffee sold fell sharply last month, while the price remained the same. five people suggest various explanations:

lorenzo: supply decreased, but demand was unit elastic.
neha: supply decreased, but it was perfectly inelastic.
sam: supply decreased, but demand was perfectly elastic.
teresa: demand decreased, but supply was perfectly elastic.
andrew: demand decreased, but supply decreased at the same time.
who could possibly be right? check all that apply.

(a) lorenzo
(b) neha
(c) sam
(d) teresa
(e) andrew