Proposition 2C Given the Following Proposition

Multiple Choice

Proposition 2C
Given the following proposition:
∼[(A ≡ ∼ Y) • (B ⊃ X) ] • [(B ∨ ∼ X) • (X ≡ A) ]
-In Proposition 2C, the main operator is a:

A) Triple bar.
B) Wedge.
C) Tilde.
D) Dot.
E) Horseshoe.