Children must learn just a few basic rules - being safe, being _________to others, and being responsible to themselves.

A．a computer technician repairing an office computer network
B．a scientist in a laboratory developing plans for a space station
C．a teacher directing computer-assisted learning in a private school
D．a technical writer sending via computer documents created at home

A．Employees' need for time alone to work intensively.
B．Employees' conflicts with second jobs.
C．Employees' conflicts with social life.
D．Employees' punctuality to work.