How to increase the visibility of Pins with Image Size?

A)  There should be at least 500 pixels of width on a Pin, and an aspect ratio of 4:3 has been found to be the best.
B)  There should be at least 600 pixels of width on a Pin, and an aspect ratio of 2:3 has been found to be the best.
C)  There should be at least 500 pixels of width on a Pin, and an aspect ratio of 2:3 has been found to be the best.
D)  There should be at least 600 pixels of width on a Pin, and an aspect ratio of 4:3 has been found to be the best.

Correct Answer :   There should be at least 600 pixels of width on a Pin, and an aspect ratio of 2:3 has been found to be the best.