Jill's Lawn Mowing Service is a small business that acts as a price taker. The prevailing marketprice of lawn mowing is $16 per acre. Jill's costs are given by (where q represents number of lawns mowed):

TC = 0.1q²+ 10q + 100

MC = 0.2q + 10

In the short run, Jill's profits are _____ and Jill should _____.

a.positive; stay in business

b.positive; shut down

c.negative; stay in business

d.negative; shut down