How has modernization changed agriculture since the Great Leap Forward? a. no more communal farms
C. contract responsibility system
b. increased production
d. all of the above
Please select the best answer from the choices provided
OA
OB
Ос
OD

What was the length to begin with?

The one that most represents the earths mantle would be the skin since the mantle is the upper part of the earths depths which is just like the skin of an apple.

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.