Externalities are not reflected in market prices, so they can be a source of economic inefficiency. a. True
b. False

this is all on your opinion. you choose what you want to do.

answer: b. false

the staff is a set of five horizontal lines and four spaces which represent a different musical pitch. the lines and the spaces are numbered from bottom to top, the bottom line is the first line and the fifth line is the line on the top. the notes on the top of the staff (fifth line) have a higher pitch than a note at the bottom of the staff.