A．oil.
B．pearls-bearing oysters.
C．a rich diversity of birds, animals and sea-creatures.
D．cultured pearls.

A．Because of competition from cheaper Japanese pearl-fishing.
B．Because of competition from oil industry.
C．Because of competition from cheaper Japanese cultured pearls.
D．Because of pollution from oil industry.

A．consumers complain about it.
B．some politicians are calling for a windfall profits tax on it,
C．compared with the higher profits in other industries, oil companies are not satisfied with it.
D．some Congressmen think it should be examined with great care.