如何正确防治内因火灾（）。

A.预防性灌浆

B.阻化剂防火、注氮防灭火

C.正确选择采煤方法

D.选择合理的通风系统防止漏风

E.均压防灭火技术

In October, James Knight owned stock in Valerio, Inc. , that was valued at $45 per share. At that time, Knight sold a call option on Valerio with an exercise price of $60 for $1.45. In December, at expiration, the stock is trading at $32. What is Knight’s profit (or loss) from his covered call strategy Knight:

A．

B．

C．