Given That the Value of Individual Production of Carol and Tessie

Multiple Choice

Given that the value of individual production of Carol and Tessie is zero, while their combined production is positive, we may conclude that:

A) any subset of the grand coalition can credibly threaten to block the coalition.
B) the coalition is not individually rational.
C) the core is empty.
D) any allocation of payoffs from the coalition will lie within the core.