Which excerpt is the best example of an appeal to ethos? o a. biofuels transferred over 100 million tons of cereals from plates to petrol tanks: to fill a 4 x 4 tank requires enough grain to feed a poor person for a year. o b. that ended nearly two decades during which the number of hungry people had stayed the same, while the world population grew by 1.2 billion. c.robert zoellick, president of the word bank, warns that the rising prices are “a threat to global growth and social stability.”d. since then, the number of hungry people worldwide has almost exactly doubled: from 460 to 925.