In the following question, out of the given four alternatives, select the alternative which best expresses the meaning of the Idiom/Phrase.
To throw cold water on

The correct answer is (c) To be discouraging or unenthusiastic about something.
Explanation:
The idiom "throw cold water on" means to discourage or dampen enthusiasm for something. It often refers to someone expressing doubts or skepticism about an idea or plan.
Example:
"She was excited about the project, but her boss threw cold water on it by pointing out all the risks involved."