Middle School

Which of the following is not an example of ethos?

Sentence 9: "Then, through a genius plan developed by ACME's intelligent engineers, we can capture the released energy."

Sentence 10: "Yes, the same company that has been a leader in service for 250 years has come up with yet another great idea."

Sentence 12: "It is 99.9 percent certain that this plan will work to help reduce global warming."

Sentence 13: "This new energy could replace electricity, and you have ACME to thank for this wonderful discovery."