In "they become so enthralled…"(Para 3), "enthralled" here means

A．will be on computers within five years.
B．lose money whenever the computers go down.
C．have trouble making the conversion to computers.
D．do not save money by using the computer.

A．believed in law.
B．was a philosopher.
C．published outspoken philosophical articles.
D．advocated original opinion.