A student in Obu’pu Secondary School discovers that he simultaneously needs a pen, an exercise book, an eraser and a ruler, but that he can purchase only one of these items. What is the first thing he is expected to do?
-
A.
Check how much he has -
B.
Find out which is the cheapest of the items -
C.
Draw up a scale of preference -
D.
Weigh the opportunity cost of each item against the other