The committee rejected his thesis because it was based mainly on conjecture rather than solid evidence and lacked______tested results.

A．the technology is popular with many Web users
B．businesses have faith in the reliability of online transactions
C．there is a radical change in strategy
D．it is accessible limitedly to established partners

A．a man whose job is to train other people
B．a man who has been trained in more than one fields
C．a man who can see the forest rather than the trees
D．a man whose concern is mainly with technical or professional matters