There is a reference variable office_a_c of type AirConditioner. Create a new object of type AirConditioner using the office_a_c reference variable. After that, turn the air conditioner on using the reference to the new object.

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.

i just joined so i'm not sure but you may need to verify your email if you haven't