According to the passage, the age range of some businesses' customers may be limited because of _____.

A．It was the most successful among the EU countries.
B．It has increased 8% in the last five years.
C．The unemployment rate has reached its lowest level for 5 years.
D．The commodity prices have decreased greatly in the country.

A．The scientists on the ground are pursuing only their most important experiments.
B．The shuttle team will be disappointed at the curtailment of the science mission.
C．The science will complete the experiments on a later shuttle flight.
D．The remaining generators are sufficient.