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Answer:
I just took the test, the answer is
B: WaterSense toilets saved customers 9.3 billion gallons of water in 2008
The only option that is true about water sense toilets is that; B: WaterSense toilets saved customers 9.3 billion gallons of water in 2008
What are water sense toilets?
The WaterSense label is a label that is mostly used on toilets that are certified by an independent body to satisfy well established high performance and efficiency standards.
Now, only water-saving toilets that complete the certification process can have the WaterSense label. From research it was discovered that WaterSense toilets saved customers 9.3 billion gallons of water in 2008 and so option B is correct.
Read more about toilet at; https://brainly.com/question/856813
