To Cut Down on Something

Please try to guess the meaning of the idiom in bold:

Sheryl has gained 45 lbs (pounds) in the last couple of months. Her doctor told her if she does not cut down on sugar and fat, she might have a heart attack soon!

What do you think “to cut down” means?

A. To increase the amount of something
B. To eat something
C. To decrease the amount of something
D. All of the Above
E. None of the Above

The answer is: C

Meaning: To cut down on something means to decrease the amount of something.
In the example above, if Sheryl does not decrease the amount of sugar and fat , she might have a heart attack!

This idiom was taken from the LSI book Reading Horizons!