We are put in charge of assembling a new line of armored “HUMVEES” for the Rock Island Arsenal before they are to be shipped out for service in Afghanistan. These are typical 4-door vehicles. Here is a list of the materials we have:
300 Wheels
350 Armored doors
180 Headlights
62 Steering Wheels
Which piece of equipment is going to “limit” how many HUMVEES we can assemble?

A. Wheels
B. Armored doors
C. Headlights
D. Steering wheels