A．The reason why most people are right-handed.
B．The similarities between man and its animal ancestors.
C．The differences between man and monkeys.
D．The way to teach new-born babies to use their hands properly.

A．Walk around the apartment for dangerous signs.
B．Check the water and electricity to see if they are working.
C．Make sure there are good locks on all the windows and doors.
D．Talk to other people who rent apartments in the same building.