What does this idiom mean: 'she simply throws cold water on it'?

[Dummy]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #9 "Water Expressions", question 3

That's always the trouble if she doesn't like it, she simply throws cold water on it.

(a) washes it completely
(b) discourages it completely
(c) cleans it completely
(d) drowns it completely

English Idioms and Expressions, Advanced Level

ESL/EFL Test #9 "Water Expressions", answer 3

That's always the trouble if she doesn't like it, she discourages it completely.

Correct answer: (b) discourages it completely
_________________________

What does this idiom mean: 'she simply throws cold water on it'?

Dummy

[Alan]

Hi,

What does it mean?

It means that if she doesn't like it, she says it is no good.

Alan
_________________
English as a Second Language
You can read my ESL story The way you write it

[Lost_Soul]

First, you cant say "what it means?"
you should say what does it mean?

Second, apparently to throw cold water on something means to discourage it completely.

[Edit] Hi, Alan. Sorry, you happened to post your message while I was posting mine