The correct order for acid strength of compounds `CH-=CH,CH_(3)-C-=CH and CH_(2)=CH_(2)` is as follows:
A. `CH-=CH gt CH_(2)=CH_(2)gtCH_(3)-C-=CH`
B. `HC-=CHgtCH_(3)-C-=CHgtCH_(2)=CH_(2)`
C. `CH_(3)-C-=CHgtCH_(2)=CH_(2)gtHC-=CH`
D. `CH_(3)-C-=CHgtCH-=CHgtCH_(2)=CH_(2)`.