Market X can be divided into two submarkets, A and B. The supply in each submarket is the same, but the demand in submarket A is greater than the demand in submarket B. If submarket B is in equilibrium, it follows that :

a. submarket A is in equilibrium.

b. there is a shortage in submarket A.

c. there is a surplus in submarket A.

d. there is a shortage in submarket B only if there is a surplus in submarket A.

e. none of the above

Each container is cut from the mould once the plastic has cooled and hardened. unit-level 2 patents are obtained for each new type of container mould. facility-level 3. plastic resins are used as the main direct material for the containers. product-level 4. a plant manager oversees the entire manufacturing operation. facility-level 5. the sales force incurs travel expenses to attend various trade shows throughout the country to market the containers. product-level 6. each container product line has a product line manager. product-level 7 the extrusion machine is calibrated for each batch of containers made. facility-level 8. each type of container has its own unique moulds. unit-level 9. routine maintenance is performed on the extrusion machines. facility-level 10. rent is paid for the building that houses the manufacturing processes. classify each activity as either unit-level, batch-level, product-level, or facility-level.