Could be true. It’s possible most people don’t have wisdom and don’t have intelligence.

Could be true. Although (B) would be false if it were limited to the people the stimulus’s author has met, (B) isn’t limited to those people. Most people in the world could be both — the author just hasn’t met them.

Could be true. The stimulus doesn’t say anything indicating that there must be at least one person who is both wise and intelligent. It’s possible nobody has both wisdom and intelligence.

Must be false. The author said she knows people who have one of the qualities of wisdom or intelligence, but not both. That means there’s at least one person out there who has wisdom or intelligence..

Could be true. The author said she knows people who have wisdom or intelligence, but not both. It’s possible many of those people are intelligent, but don’t have wisdom.