答案：B

解析：

Choice (B) is correct. It avoids the modification error of the original by replacing the modifying phrase ("Although hailed as one of the greatest choreographers of his time") with the dependent clause ("Although Merce Cunningham was hailed as one of the greatest choreographers of his time"). It does not make sense to say that his "company," rather than Merce Cunningham himself, was "hailed as one of the greatest choreographers of his time."