To avoid market failure there must be Question 1 options:

a)

A maximum of positive externalities with any kind of market structure.

b)

Externalities and oligopoly for efficiency.

c)

Perfect competition and no externalities

d)

Perfect competition and positive externalities.

explore some of these tourist attractions

the metropolitan museum of art. source: anton_ivanov / shutterstock.

central park. source: gagliardiphotography / shutterstock.

national 9/11 memorial and museum.

empire state building.

statue of liberty.

the museum of modern art (moma)

rockefeller center.

brooklyn bridge.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.