Fact 1 : Pictures can tell a story.
Fact 2 : All storybooks have pictures.
Fact 3 : Some storybooks have words.
If the first three statements are facts, which of the following statements must also be a fact?
I : Pictures can tell a story better than words can.
II: The stories in storybooks are very simple.
III: Some storybooks have both words and pictures.

Correct option is C

I: Pictures can tell a story better than words can.
This is a subjective claim, not supported by the facts. The facts don't compare the effectiveness of pictures vs. words.

Conclusion: Not necessarily a fact.

II: The stories in storybooks are very simple.
The facts say nothing about the complexity of the stories.

Conclusion: Not necessarily a fact.

III: Some storybooks have both words and pictures.
Fact 2 says all storybooks have pictures.
Fact 3 says some storybooks have words.

Therefore, at least some storybooks must have both words and pictures.

Conclusion: This must be a fact.