[U]Where once the union had acquiesced to the
prejudices of its English-speaking members by
supporting [/U]the imposition of an alien tax on immigrant workers, after 1897 the United Mine Workers made a determined effort to nlist Italians and Slavs in its ranks.
A. Where once the union had acquiesced to the
prejudices of its English-speaking members by
supporting
B. Where once the union acquiesced to its
English-speaking members' prejudice for the
support of
C. While once the union had acquiesced to the
prejudices of its English-speaking members in
support of
D. While once the union acquiesced to its
English-speaking members' prejudice in
supporting
E. While once the union had acquiesced to the
prejudices of its English-speaking members in
its supporting of
