Identify the Main Connective in the Following Statement $\bigvee$ (T $\equiv$ M)] $\supset$

Identify the main connective in the following statement. [(N • D) $\bigvee$ (T $\equiv$ M) ] $\supset$ ~N

A) •
B) $\bigvee$
C) $\supset$
D) $\equiv$
E) ~