下边漫画说明

① 矛盾双方的同一性寓于斗争性之中  ② 矛盾双方的同一以差别和对立为前提

③ 矛盾双方相互依存与贯通          ④ 矛盾的同一性是绝对的、有条件的

A．①②

B．③④

C．②③

D．②④

An analyst does research about the put-call parity. With respect to the put-call parity, which of the following positions is equal to a synthetic call position（）

A. Long a put, long the underlying, and short a risk-free bond.

B. Short a put, long the underlying, and short a risk-free bond.

C. Long a put, short the underlying, and long a risk-free bond.