An intransitive verb doesn't require a direct object. A cannot be correct because, Ian sharpened what? His hockey skates. So that is the direct object, therefore the verb is transitive. C and D are the same case.
The correct answer is B, because the verb is intransitive as it doesn't need an object. You cannot answer - Carla skates what? No, it is just Carla skates.
Answer:
Make readers want to read more.
Explanation:
This is typical. Every person would want to make more money. So so people become Authors of a book and want to make more money, so they make readers want to read more, so they buy more.
I think the answer should be, B
1. planning
2. execution or monitoring
3. development progress