Idiomatic phrase "learn and tell"

[Xavierka]

English Language Tests, Intermediate level

ESL/EFL Test #382 "English Slang Idioms (113)", question 7

"I can't believe that you betrayed my confidence and told Irma that I was mad at her and why. I didn't figure you for someone who would ......... and tell. I thought I could trust you!" Rachel yelled at Jessica.

(a) slap
(b) sell
(c) kiss
(d) learn

English Language Tests, Intermediate level

ESL/EFL Test #382 "English Slang Idioms (113)", answer 7

"I can't believe that you betrayed my confidence and told Irma that I was mad at her and why. I didn't figure you for someone who would kiss and tell. I thought I could trust you!" Rachel yelled at Jessica.

Correct answer: (c) kiss
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Is there an idiomatic phrase "learn and tell" If it is so, what would it mean?

[Mister Micawber]

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No such idiomatic phrase exists.
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Native English teacher at Mister Micawber's