Exercício: Condicionais

My aunt lives on a farm. When I asked her if she thought it would rain that day, she answered, " you know what they say. If ____."
a ( ) birds will fly low, you will expect rain to fall and wind to blow.
b ( ) birds would fly low, expect rain to fall and a blow.
c ( ) birds fly low, you would expect rain to fall and wind to blow.
d ( ) birds fly low, expect rain to fall and wind to blow.
e ( ) birds fly low, expected rain to fall and wind to blow.