In order to keep the area of the parallelogram unchanged and increase the height to 4 times of the original, the bottom should be ()

In order to keep the area of the parallelogram unchanged and increase the height to 4 times of the original, the bottom should be ()

In order to keep the area of the parallelogram unchanged and increase the height to four times of the original, the bottom should be (reduced to one fourth of the original)

In order to keep the area of the parallelogram unchanged and increase its height to four times of the centigrade, the base should be ()

In order to keep the area of the parallelogram unchanged and increase the height to four times of the centigrade, the base should be reduced to one fourth of the original

The area and height of a parallelogram are proportional to each other

Success
S = bottom * height