________ variables are also referred to as 'name value pairs', because a variable's name and its value can be thought of as a pair

Scalar variables store a single value and are referred to as name-value pairs because each variable name maps to exactly one value. Arrays store multiple indexed values, hashes store key-value pairs (which are also name-value pairs but for collections), and vectors are ordered collections. Option C is correct as scalars represent the simplest name-value pairing.