Correct Answer:
D. In
This question tests the correct use of prepositions with verbs. In English, the verb "stick" is commonly followed by the preposition "to" when it means to remain loyal, committed, or faithful to a belief, decision, promise, or principle.
The expression "stick to your faith" means to continue believing in and remaining committed to your religion or personal beliefs. Other prepositions such as on, with, and in do not form a correct or natural collocation with the verb "stick" in this context.
- Correct Phrase: Stick to your faith.
- Meaning: Remain committed to your beliefs or principles.
- Grammar Rule: The verb "stick" is followed by the preposition "to".
Therefore, the correct answer is: "To".