Marginal resource cost is A. the increase in variable costs resulting from producing one more unit of output.
B. the same as the marginal cost of the product.
C. the same as the resource price when a firm is acquiring the resource in a purely competitive market.
D. the increase in fixed costs resulting from producing one more unit of output.

Mai and chuck have been divorced since 2012. they have three boys, ages 6, 8, and 10. all of the boys live with mai and she receives child support from chuck. mai and chuck both work and the boys need child care before and after school. te boys attend the fun house day care center and mai paid them $2,000 and chuck paid them $3,000. mai's agi is $18,000 and chuck's is $29,000. mai will claim two of the boys as dependents. she signed form 8332 which allows chuck to claim one of the boys. who can take the child and dependent care credit?