To answer this question, you need to understand the correct verb form to use after the phrase "Thank you for letting me."
Option A) to take - This option is incorrect because it uses the infinitive form of the verb "take" after the phrase "Thank you for letting me." The correct form should be a base verb form.
Option B) taken - This option is incorrect because it uses the past participle form of the verb "take" after the phrase "Thank you for letting me." The correct form should be a base verb form.
Option C) take - This option is correct because it uses the base verb form of "take" after the phrase "Thank you for letting me." The correct form should be a base verb form.
Option D) taking - This option is incorrect because it uses the present participle form of the verb "take" after the phrase "Thank you for letting me." The correct form should be a base verb form.
The correct answer is C) take. This option is correct because it uses the base verb form of "take" after the phrase "Thank you for letting me."