What's the author's attitude towards long-promised home robot

A．Robots will be less expensive than they are now.
B．They will be used as aides for the disabled.
C．They will all be gentle and kind.
D．They will deal with intruders.

A．they can do some domestic jobs in hospital
B．they can cook and package food
C．they can greet people at the counter
D．they can do jobs human needs to solve a shortage of labourers