Select the option that can replace the question mark (?) in the following equation.

$$ 2 + 5\div [5+8\div( 1+\frac{1}{3}) - 1] $$ = ?

A

$$ \frac{1}{2} $$

B

$$ \frac{5}{2} $$

C

$$ \frac{3}{2} $$

D

2