10 points! ! your friend is adding to her argument that favors teens owning smartphones. which of the following is the most respectful, relevant, and credible statement that could add to her argument? a students who use mobile devices to study spend 40 more minutes studying per week. b only one in four teens has experienced bullying "through a mobile device or the internet." c the cyber bullying research center reports that more than 80 percent of teens use a cell phone regularly. d dr. meryl ain says, "smartphones can be powerful learning tools, instantly connecting users to information."