Refer to above figures. Prior to the shift of the curves, which panel and which curve involve the existence of negative externality?

In the above figure, which point corresponds to an increase in human capital?

A) Figure A B) Figure B C) Figure C D) Figure D

During World War II, a labor shortage emerged in some markets. New recruits into the civilian labor force included

(a) teenage females. (b) married women. (c) retired people 65 years of age or older. (d) all of the above.