Economies of Scope in the Production of Goods G and W

Multiple Choice

Economies of scope in the production of goods G and W exist if

A) $\operatorname { LTC } ( G , W ) > \operatorname { LTC } ( G , 0 ) - \operatorname { LTC } ( 0 , W )$
B) $\operatorname { LTC } ( G , W ) < \operatorname { LTC } ( G , 0 ) + \operatorname { LTC } ( 0 , W )$
C) $\operatorname { LTC } ( G , W ) - \operatorname { LTC } ( G , 0 ) < \operatorname { LTC } ( 0 , W )$
D) both a and c
E) both b and c