A:
All Animals Are Always Aggressive
B:
All Animals Are Aggressive
C:
Some Animals Are Aggressive
D:
At Least One Animal Is Aggressive
Explanation
The opposite of the statement "Animals are seldom aggressive" is that "Some animals are aggressive." Therefore, option C, "Some animals are aggressive," conveys the same meaning as the false statement "Animals are seldom aggressive."
Option A, "All animals are always aggressive," is too extreme and does not convey the same meaning.
Option B, "All animals are aggressive," is also too extreme and does not take into account the fact that some animals may not be aggressive at all.
Option D, "At least one animal is aggressive," is not specific enough and does not convey the same meaning as the false statement.