Sentence Correction (SC) | Re: By the mid-seventeenth century, Amsterdam had built a new

By the mid-seventeenth century, Amsterdam had built a new town hall so large that only St. Peter's in Rome, the Escorial in Spain, and the Palazza Ducale in Venicecould rival it for scale or magnificence.

(A) could rival it for -'A built a new hall so large that only C, D and E could rival it for..xyz' ---> A is singular here and the tense is past tense

(B) were the rivals for it in their -'their' is a pronoun for what?

(C) were its rival as to -'as to' is incorrect idiom

(D) could be
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