their protest against any policy unresponsive to their demand (5)_____ the younger professionals seek

Some of the retired competitors go as far as to organize strikes and raliclies to voe their protest against any policy unresponsive to their demand (5)_____ the younger professionals seek more upgrading solutions to the problem as more 
A. whereby 
B. whereas             
C. whereupon                  
D. wherein

Trả lời
whereas = nhưng ngược lại
Chọn B