Almost a decade after New York State passed laws to protect patients by reducing the
grueling hours worked by medical residents, twelve hospitals have been investigated by
state medical officials, finding that all twelve consistently break the laws, many residents
work longer than 24 hours straight, and that more than half the surgical residents work
more than 95 hours a week.
22
A. twelve hospitals have been investigated by state medical officials, finding that all
twelve consistently break the laws, many residents work longer than 24 hours
straight, and that more than half the surgical residents work
B. an investigation by state medical officials of twelve hospitals have found all
twelve consistently breaking the laws, that many residents work longer than 24
hours straight, with more than half the surgical residents working
C. an investigation of twelve hospitals by state medical officials has found that all
twelve consistently break the laws, that many residents work longer than 24 hours
straight, and that more than half the surgical residents work
D. twelve hospitals were investigated by state medical officials who found all twelve
breaking the laws, with many residents working longer than 24 hours straight, and
more than half the surgical residents work
E. an investigation by state medical officials has found that, of twelve hospitals, all
twelve consistently break the laws, that many residents work longer than 24 hours
straight, with more than half the surgical residents working

A and D are passive.

B illogically says that the investigation was carried out by officials of 12 hospitals.
E is awkward.

is it C ?

Please underline the SC question before posting.
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I had to paste it to a word document, since it was so hard to read without the underline.

Eventually, went with C.