---- The strong wind has a bad ______ our newly planted young trees.

---- What’s more, it ______ many people riding bikes on the road.

A. effect on; affects                               B. affect on; effects

C. effect in; affects                         D. affect in; effects

 -- The strong wind has a bad ___________ our newly-planted young trees. 

   -- What’s more, it ___________many people riding bikes on the road.

   A. effect on, affects                              B. affect on, effects

    C. effect in, affects                                   D. affect in, effects