1.6.1: Identifier validator. Check if the following identifiers are valid: c, cat, n1m1, short1, _hello, 42c, hi there, and cat! (Note: Doesn't consider library items.)

correct option c, cat, n1m1, short1,

Explanation:

correct option c, cat, n1m1, short1,

The variable is used to store the value of the value varies during the program execution ...

some of the basic rules of identifier

The variable must be started with the alphabet We cannot declare the variable name as keyword i. e "that value is already defined and in the compiler" Variable-length does not exceed 8 characters We cannot use space to declared any variable _hello, 42C, hi there and cat! are not follow the basic rule of identifier so they are not identifier validator