I have a question

[cutemina1211]

when the weather.......a bit cold,
A. changes B. becomes C. turns D. shifts

I don't know the answer and the diffrence of each word
Please let me know the exact meaning and usage of each word.
Thanks a lot.

 

[yosra]

please i have a big problem that is i can't keep many vocabulary i my mind so that i can't speak well .... i always forgot the words