Concrete is sold by the cubic yard. What is the mass, in kilograms, of 2.00 cubic yard of concrete that is 3.45 times as dense as water? (Consider that 1.00 m = 1.094 yd, a cubic meter of water has a mass of 1,000 kg, and density is mass per unit volume.) Select one: O a. 3450 kg O b. 4025 kg O c. 9070 kg O d. 5270 kg