go cold turkey

It is cold here in Japan, so this month, we are featuring some idioms which contain “winter” words. Here is the first one –  go cold turkey.

Do you know it? Can you guess the meaning from the conversation below?

Debra: Are you going to quit smoking next year?

Sandra: Yes, I’m going to quit on January 1st.

Debra: Are you going to cut down slowly?

Sandra: No. I’m going cold turkey. I will stop completely on January 1st!

Does it mean 

a) stop a habit suddenly

b) eat cold turkey

c) stop a habit slowly

The answer is below! ↓

Answer: a) stop a habit suddenly