On March 23, 1999, the musical MAMMA MIA! made its first public appearance in London. it ___ the kind of welcome it has been getting ever since.
(A) is given
(B) was given
(C) has given
(D) had given
问题：
1.请问句型中出现两个it的意思以及文法，看不懂本句的结构。
2.想请问答案是B还是C？因为看到两种答案都有人说正确。
谢谢