A Clothing Store and a Jeweler Are Located Side by Side

Multiple Choice

A clothing store and a jeweler are located side by side in a shopping mall.If the clothing store spend C dollars on advertising and the jeweler spends J dollars on advertising, then the profits of the clothing store will be (18 + J ) C - 2C ² and the profits of the jeweler will be (24 + C ) J - 2J ².The clothing store gets to choose its amount of advertising first, knowing that the jeweler will find out how much the clothing store advertised before deciding how much to spend.The amount spent by the clothing store will be

A) $10.
B) $5.
C) $20.
D) $30.
E) $15.