XDF－319 现在完成时的用法

Bob Willber became Sidney Bechet's student and protege when he was nineteen and, for a few years in the 1940's, came as close to being a carbon copy of the jazz virtuoson in performance as anyone has ever come.

A)as anyone has ever come

B)as anyone ever had been

C)as anyone ever had done

XDF答案为A，但是很多人认为A错，甚至有人问了学校的教授（在英国）都说A错C对，请大家指点迷津。