Idiom: I'm all for it!

[Shanthi]

Test No. express/advan-7 "English Grammar Prepositions", question 8

You should know that I'm all for it.

(a) completely taken with
(b) wholly interested in
(c) in complete agreement with
(d) in complete satisfaction with

Test No. express/advan-7 "English Grammar Prepositions", answer 8

You should know that I'm in complete agreement with it.

Correct answer: (c) in complete agreement with
_________________________

You should know that I am all for it.

[Mister Micawber]

.
There is no need to expand the contractions for us, Shanthi.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber