79. Opened in 1683, the Ashmolean was the first public museum in Great Britain, while earlier the Bodleian has been the first truly public library. (A) while earlier the Bodleian has been (B) where the Bodleian earlier is (C) just as earlier the Bodleian had been (D) as the earlier Bodleian has been (E) the Bodleian earlier being
答案我也选了c), 因为其他的选项更不像。不过为什么要用had been呢?什么地方暗示了Bodleian已经不再是first truly public library了吗?恳请指点。