Thank you for vs. thank to?

[Tanka]

English Grammar Tests, Elementary Level

ESL/EFL Test #108 "Postcard: Writer", question 1

Thank you very much ......... the kind letter you sent me

(a) of
(b) to
(c) for

English Grammar Tests, Elementary Level

ESL/EFL Test #108 "Postcard: Writer", answer 1

Thank you very much for the kind letter you sent me

Correct answer: (c) for

Your answer was: incorrect
Thank you very much to the kind letter you sent me
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why use "for" and not "to" ?
thanks for your help !
gilson

[Mister Micawber]

.
'To' is the wrong preposition. You are not thanking the letter you are saying thankyou to the person for the letter.
.
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Native English teacher at Mister Micawber's