```FROM THE OPTIONS LETTERED A TO D BELOW EACH OF THE FOLLOWING SENTENCES, CHOOSE THE ONE THAT BEST DESCRIBES THE UNDERLINED EXPRESSION AS IT IS USED IN THE QUESTION```
I shouldn't go outside without a rain coat because it's raining cats and dogs

• A. It's just started to rain
  
• B. It's raining very heavily
  
• C. it's going to rain
  
• D. it's raining a little