What branch of economics is concerned with effects of nutrition labeling on the dietary quality of consumers (i.e., what-if types of questions)?

If the dollar falls from 1.25 euros to 1.00 euro, then the dollar has ________ and the euro has ________

A) depreciated; depreciated B) depreciated; appreciated C) appreciated; appreciated D) shrunk; grown E) appreciated; depreciated

The above figures show the market for hamburger meat. Which figure(s) shows the effect of a nation-wide strike by butchers and meat-packers?

A) Figure B B) Figure C C) Figure D D) Figures B and C