If John Can Produce 10 Chairs or 20 Lamps During

If John can produce 10 chairs or 20 lamps during a week,while Mary can produce 12 chairs or 22 lamps in the same time,who has the absolute advantage in producing each good?

A) Mary in producing both goods
B) John in producing chairs,Mary in producing lamps
C) Mary in producing chairs,John in producing lamps
D) John in producing both goods
E) Both Mary and John in both goods