4. peasants in china
a. account for very little of the nation’s overall production of food
b. are given less opportunities to make profit than ever before due to harsh communist control by the chinese government
c. have experienced a dramatic shift because many left farming and moved to cities to work in factories
d. must give all of their earnings from production to the chinese government.

Peasants in China have experienced a dramatic shift because many left farming and moved to cities to work in factories. The correct option among all the options that are given in the question is the third option or option "c". I hope that the answer has actually come to your help.

What are the options?

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.