For many patients, institutional care is the most （）and beneficial form of care.

A．A company should not sell its high quality shoes in discount stores.
B．A company should not limit its distribution network.
C．A company should do follow-up surveys of its products.
D．A company should correctly evaluate the impact of a new craze on the market.

A．does not want to further expand its retailing network
B．still limits the number of shoes supplied to stores
C．is still particular about who sells its products
D．still carefully chooses the manufacturers of its products