After the incident the interviewee sounded______.

A．When a person tries to help others, he must be clear that there is a real emergency.
B．When a person tries to help others, he should know whether hey are worth his help.
C．A person must take the full responsibility for the safety of those in emergencies if he wants to help.
D．A person with a heart attack needs the most.

A．future technology of robots
B．automated machines’ use
C．the tiny robots
D．the development of micro-electromechanical technique