Answer:
constant or constant expression
register name
variable name (memory)
Explanation:
Literally, operand means data which an operation can be performed on. The operation could be an arithmetic or logical operation.
From the list of options, several operations can be performed on:
- constants e.g.

- registers and
- variables e.g. (a + b)
<em>However, no operation can be performed on keywords and/or reserved words.</em>
IsTeenager = ( ( kidAge >= 13 ) && ( kidAge <= 19 ) ) ? true : false;
Another way:
if( ( kidAge >= 13 ) && ( kidAge <= 19 ) )
isTeenager = true;
else
isTeenager = false;
Equal sign (=)
hope so !!!
Sorry for this but to be honest we do t get taught this in the school I go to sorry