Careful : cautious :: boastful :A)arrogantB)humbleC)joyfulD)suspicious

This is an analogy question. The relationship between the words is that the first is a characteristic of the second.

Careful is a characteristic of someone who is cautious.

So, we need to find out which word is a characteristic of someone who is boastful.

A) Arrogant - This could be a characteristic of someone who is boastful. They might show an inflated sense of their own importance or abilities.

B) Humble - This is the opposite of boastful. A humble person does not boast about their achievements.

C) Joyful - This is not necessarily related to being boastful. A person can be joyful without boasting about anything.

D) Suspicious - This is also not necessarily related to being boastful. A person can be suspicious without boasting about anything.

So, the answer is A) Arrogant.