The defence of the oil installation had been assigned _____ my regiment.
A. on
B. to
C. of
D. for
A. on
B. to
C. of
D. for
A. of
B. on
C. for
D. from
A. on
B. about
C. in
A. in
B. for
C. to
D. of
A. to
B. in
C. for
D. from
A. with
B. on
C. into
D. in
A. out
B. under
C. in
D. of
A. about
B. for
C. of
D. to
A. to
B. of
C. by
D. in