If $$p, q, r$$ are three statements, then $$(p \rightarrow (q \rightarrow r))$$ is equivalent to

A

$$(p \rightarrow q) \rightarrow r$$

B

$$(p \wedge q) \rightarrow r$$

C

$$(p \vee q) \rightarrow r$$

D

$$p \rightarrow (q \vee r)$$