If variable answer stores a boolean value, then what are the possible values for the variable?
0 or 1
"true" or "false"
true or false
any value

true or false and 0 or 1.

Explanation:

The boolean variable can have only two values that can be true or false.

Since we have variable answer of type boolean it can store true or false.In boolean algebra 0 is considered as false and 1 is considered as true.So we can also store 0 or 1 in boolean.If we store any other value in boolean algebra it will be regarded as 1 because only 0 is considered as false everything else is true.

it can either be 2. or 4. : ) tell me if i'm wrong or right