一个语法问题,知道的回答下.Althea Gibson,the first African American tenni

一个语法问题,知道的回答下.
Althea Gibson,the first African American tennis player to be recognized as a world champion,beginning to play amateur tennis in the 1940s.
在此句中beginning to play 下划线,需要被替换.此题答案选择B 但我不知道为什么,还有别的四个答案为什么不对.
(A) beginning to play
(B) began playing
(C) and she began playing
(D) she began to play
(E) she had begun playing