From Princeton Review practice test:
Believed to have originated from local hospitals, oceangoing garbage scows dump medical refuse that may provide an explanation for the existence of unacceptable levels of pollution at several local beaches.
A) Believed to have originated from local hospitals, oceangoing garbage scows dump medical refuse that
B) Oceangoing garbage scows dump medical refuse that is believed to have originated from local hospitals, and this
C) Oceangoing garbage scows dump medical refuse, believed to have originated from local hospitals, that
D) Originated, it is believed, from local hospitals, an oceangoing garbage scow dumps medical refuse and
E) Originating, it is believed, from local hospitals, oceangoing garbage scows dump medical refuse and
OA: B
I understand that it can't be "medical refuse" that "may provide an explanation," but I thought using "this" as a stand-alone pronoun was wrong?
Believed to have originated from local hospitals, oceangoing garbage scows dump medical refuse that may provide an explanation for the existence of unacceptable levels of pollution at several local beaches.
A) Believed to have originated from local hospitals, oceangoing garbage scows dump medical refuse that
B) Oceangoing garbage scows dump medical refuse that is believed to have originated from local hospitals, and this
C) Oceangoing garbage scows dump medical refuse, believed to have originated from local hospitals, that
D) Originated, it is believed, from local hospitals, an oceangoing garbage scow dumps medical refuse and
E) Originating, it is believed, from local hospitals, oceangoing garbage scows dump medical refuse and
OA: B
I understand that it can't be "medical refuse" that "may provide an explanation," but I thought using "this" as a stand-alone pronoun was wrong?

















