Idioms

 Which of the following quotes taken from a movie is an example of an idiom?

a. from: The Avengers
Loki: I am a god, dull creature, and I will NOT be bullied by a ...

b. from: Star Trek IV: The Voyage Home

Kirk: If we play our cards right, we may be able to find out when those whales are being released.

Spock: How will playing cards help?

c. from: Clash of the Titans

Perseus: If I do this, I do it as a man.
Draco: But you are NOT just a man.

d. from: Taken

Bryan: I have a daughter who wants to be a singer. I was wondering if you have any tips for her.
Sheerah: Yeah, I do. Tell her pick another career.

Scroll down for the answer.

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To get this question right, you need to know the definition of idiom:

The term refers to a set expression or a phrase comprising two or more words. An interesting fact regarding the device is that the expression is not interpreted literally. The phrase is understood as to mean something quite different from what individual words of the phrase would imply. Alternatively, it can be said that the phrase is interpreted in a figurative sense. Further, idioms vary in different cultures and countries.

from: http://literarydevices.net/

For all of these, the only one that has a set expression is when Kirk is talking to Spock and says, "play our cards right," so the correct answer is b.