In comparison to other sign languages around the world, why is ASL considered a sophisticated and mature form of sign language? a It is designed to be easily mastered. b It does not have a set of "words." c It has its own structure, grammar, and word order. d It can be translated into other languages.
C - It has its own structure, grammar, and word order
Explanation: Linguists have postulated that this is because the sentence contains some unpronounced -- but cognitively real -- logical variables like x and y.