Diamond Jewelers is trying to determine how to advertise in order to maximize their exposure. Their weekly advertising budget is $10,000. They are considering three possible media: tv, newspaper, and radio. Information regarding cost and exposure is given in the table below:

Medium	audience reached per ad	cost per ad ($)	maximum ads per week
TV	7,000	800	10
Newspaper	8,500	1000	7
Radio	3,000	400	20

Let T = the # of tv ads, N = the # of newspaper ads, and R = the # of radio ads.

Given this information, which of the following sets of inequalities properly represent the limits on advertisements per week by media?

a.

T + R + N 37

b.

T 10; N 7; R 20

c.

T 10; N 7; R 20

d.

T + R + N 37