SAT语法提问
In 1882,there only seven female doctors practicing in France,when in 1903 the number rising to 95.
A.when in 1903 the number rising to 95
B.but by 1903 the number had risen
C.its number rising in 1903
E.However,in 1903when the number had risen
为什么是选B,A错在哪了?