Question

A newspaper article states that toilet flushes waste about 7 gallons of water per flush. Why is this information most likely to be incorrect?

a. newspapers do not generally give reliable information
b. the information provided by newspapers does not have scientific basis
c. scientific investigation shows that low flush toilets use about 1.6 gallons of water per flush
d. it is not possible for newspaper journalists to measure the exact amount of water used by a toilet flush

Answer 1

c. scientific investigation shows that low flush toilets use about 1.6 gallons of water per flush

This number contradicts the established knowledge regarding how much water is used in a flush. Not only that, it doesn't make logical sense. You can see the amount that gets flushed between the water in the bowl and the water in the tank. This amount is not close to 7 gallons, which is two gallons more than the water jugs on top of water coolers. 

Answer 2

The answer is C.  Confirmed by my test. Yeah.