The Chinese idiom “瞎猫碰上了死耗子 (Xiāmāo pèng shàng le sǐ hàozi)” means “blind luck.” So, the answer D is correct as a person winning unexpectedly is a kind of blind luck.
Learn more commonly used Chinese idioms:
Misfortune may actually be a blessing
To Waste One’s Talent on A Petty Job
If You Give Someone an Inch, They Will Take a Mile