Why do scientists use software rather than hardware in their experiment

A．All the students would like a formal ball.
B．Raising money will be hard.
C．The festival will begin the year nicely.
D．The club needs some sports as well.

A．They might eventually cause you to lose sleep
B．They help produce a neurotransmitter in the brain.
C．You must not drink milk if you take them.
D．They make it unnecessary to take naps.