-Yesterday it rained heavily.Everywhere was wet.-Yes,I couldn't believe____.

-Yesterday it rained heavily.Everywhere was wet.-Yes,I couldn't believe____.
-Yesterday it rained heavily.Everywhere was wet.
-Yes,I couldn't believe____.
A.the water came above our knees
B.the water has come above our knees
C.the water comes above our knees
请问选哪个?为什么?come above的用法是?