There are several vehicles in a parking lot. Some of them are motorcycles (with 2 wheels), and some are cars (with 4 wheels). There are 11 vehicles in the lot, and there are 34 wheels. How many vehicles of each type are in the lot? O A. 7 motorcycles and 5 cars B. 5 motorcycles and 6 cars C. 6 motorcycles and 5 cars D. 4 motorcycles and 7 cars