
Passage: Mr. Chen was going to hold a party of relatives and friends. He came forward to invite his father's brother-in-law, his brother-in-law's father, his brother's mother-in-law and his mother-in-law's brother.
Question: Which of the following options indicates how many guests Mr. Chen invited at least?
A. A.No guests were invited
B. B.1 guest
C. C.2 guests
D. D.3 guests
Answer: