Question $3$

$2\mathrm{.}5$ pts

If $O$ is "The light is on$",B$ is "The button is pressed", and $A$ is "The alarm is ringing" which of the following sentences represents $(B^{{?}^{?}}A)harrO$

The light being on is necessary and sufficient for the alarm to be ringing and the button to be pressed.

The light being on is necessary for the alarm to be ringing and the button to be pressed.

The light being on is sufficient for the alarm to be ringing and the button to be pressed.

None of these