The owner of a bike shop sells unicycles and bicycles and keeps inventory by counting seats and wheels. One day, she counts 20 seats and 28 wheels. The equation representing the total number of seats is u+b=20 where uis the number of unicycles and b is the number of bicycles. Select the equation representing the number of wheels. A. u+2b=28 B. u+2b=20 C. 2u+b=28 D. 2u+b=20 SURMIT