Read the sentence then fill in the blank below with the correct answer:

Shìjiè zhēnde hěn xiǎo, wǒ zuótiān cái fāxiàn, nǐ gěi xiǎozhāng jièshào de nánpéngyǒu shì wǒ qīzi yǐqián de tóngshì.
世界真的很小，我昨天才发现，你给小张介绍的男朋友是我妻子以前的同事。

Wèn: Xiǎozhāng de nánpéngyǒu shì wǒ qīzi de ______.
问：  小张          的     男朋友        是  我 妻子 的______.
Ask: Xiaozhang's boyfriend is my wife's _____.

A. 以前的同事 (Yǐqián de tóngshì)
B. 以前的丈夫 (Yǐqián de zhàngfū)
C. 以前的男朋友 (Yǐqián de nánpéngyǒu)