The correct answer is D: None of the above
The question presents three groups:
- High-level managers
- People who speak more than one language
- People with higher-than-average IQ
Since the question asks which statement must be true, we need to eliminate any option that is not guaranteed.
Statements (A) and (B) cannot be correct because the relationships between the groups are unknown. For example, high-level managers and people with higher-than-average IQ may overlap fully, partially, or not at all, so these statements could be true, but they are not necessarily true.
It’s also important to remember that a statement like “all high-level managers speak more than one language” does not imply the reverse. So even if one direction were true, it wouldn’t guarantee the other. For this reason, statement (C) is also not necessarily true.
Since none of the statements must be true, the correct answer is D, none of the above.