According to the information given in Paragraph 5, we can conclude that the distance between the earth and the moon is approximately__________.

A．A collection or an assortment.
B．A building, an institution, or a room for the exhibition of artistic work.
C．An underground tunnel or passageway, as in a cave or one dug for military or mining purposes.
D．A photographer's studio.

A．criticize doctors for exercising too much control over patients
B．analyze some important economic factors in health-care
C．urge hospitals to reclaim their decision-making authority
D．inform potential patients of their health-care rights