Tenor George Shirley - answer c

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Tenor George Shirley - answer c

by gilm » Thu Nov 17, 2011 3:05 am
Tenor George Shirley sang more than 20 leading roles at the Metropolitan Opera since having his debut there as Fernando in Cosifan tulle on October 24, 1961.
(A) sang more than 20 leading roles at the Metropolitan Opera since having
(B) sang more than 20 leading roles at the Metropolitan Opera since having had
(C) has sung more than 20 leading roles at the Metropolitan Opera since
(D) has sung more than 20 leading roles at the Metropolitan Opera after
(E) has sung more than 20 leading roles at the Metropolitan Opera subsequently to

isnt this past of the past? why is the answer c?
Source: — Sentence Correction |

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by throughmba » Thu Nov 17, 2011 8:09 am
'since' is used for a certain date in past. since with present perfect is the best choice.
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