The correct answer is: A. Only assumption I is implicit
The statement is: “You know that your suit is excellent when people ask about your tailor who tailored the suit.”
The first assumption is: “People do not ask about your tailor if your suit is not good.”
The second assumption is: “The people want to know the criterion of an excellent suit.”
Assumption I is implicit because the statement implies that people will only ask about your tailor if they think your suit is good. Assumption II is not implicit because the statement does not say anything about why people are asking about your tailor. They could be asking for a variety of reasons, such as to compliment you on your suit, to get the name of your tailor, or to find out where they can buy a similar suit.
Here is a more detailed explanation of each assumption:
Assumption I: People do not ask about your tailor if your suit is not good.
This assumption is implicit because the statement implies that people will only ask about your tailor if they think your suit is good. The statement does not explicitly say this, but it is a logical conclusion to draw. If people think your suit is not good, they are unlikely to ask about your tailor. They may simply assume that you bought the suit off the rack or that you tailored it yourself.
Assumption II: The people want to know the criterion of an excellent suit.
This assumption is not implicit because the statement does not say anything about why people are asking about your tailor. They could be asking for a variety of reasons, such as to compliment you on your suit, to get the name of your tailor, or to find out where they can buy a similar suit. The statement does not provide enough information to conclude that the people asking about your tailor are necessarily interested in the criterion of an excellent suit.