Sentence Correction

The portrait masks used by the Baule people in dance celebrations may be commissioned from a carver as complement to someone, or it may be made at the carver's own initiative , but no mask can be made without having the permission of its subject.

(a) it may be made at the carver's own initiative , but no mask can be made without having

(b) they may be made at the carver's own initiative, but no mask can be made without

(c) it might be initiated by the carver on his own, but masks cannot be made without

(d) they might be initiated by the carver on his own, but any mask to be made has to have

(e) it might be made at carver's own initiative, but none of the masks can be made unless they have

OA:B

Source:GMATPrep EP2

Please explain POE

NandishSS wrote:The portrait masks used by the Baule people in dance celebrations may be commissioned from a carver as complement to someone, or it may be made at the carver's own initiative , but no mask can be made without having the permission of its subject.

(a) it may be made at the carver's own initiative , but no mask can be made without having

(b) they may be made at the carver's own initiative, but no mask can be made without

(c) it might be initiated by the carver on his own, but masks cannot be made without

(d) they might be initiated by the carver on his own, but any mask to be made has to have

(e) it might be made at carver's own initiative, but none of the masks can be made unless they have

In A, C and E, it (singular) does not agree with masks (plural).
Eliminate A, C and E.

D: any mask...has to have the permission
This meaning is nonsensical:
a MASK cannot obtain permission.
Eliminate D.

The correct answer is B.