Three roads lead into a stadium's parking areas. Each road has four lanes (two in each direction) with a capacity of 1,000 vehicles/lane/hour. If 10,000 vehicles are expected for a game, how long will

Three roads lead into a stadium's parking areas. Each road has four lanes (two in each direction) with a capacity of 1,000 vehicles/lane/hour. If 10,000 vehicles are expected for a game, how long will it take for all of them to enter the parking areas?

a) 2 hours

b) 1 hour

c) 1 hour and 40 minutes

d) 90 minutes