（）of all businesses in the United States are small.

A．their own businesses will provide large income but less responsibility
B．their own businesses will not relieve them from paper work and responsibility
C．their own businesses will require longer working hours but less paper work
D．their own businesses could easily fail

A．borrowed money
B．waited for a good time to open his business
C．developed an inadequate plan
D．studied, prepared a plan, and trained himself