Which of the following best illustrates the logos type of rhetorical appeal?
A -Don't be the last person to get this new phone; you'll be the laughingstock of your friends.
B - He's the best and foremost expert in forensics and ballistics for the federal government; if anyone is qualified to testify, it's him.
C - If we don't move from this section soon, the flood will spread to us, and we'll be trapped.
D -More than one hundred studies have been conducted and 97% of them show that the positive effects of this medicine outweigh the negative side effects.