A student is writing an argumentative essay about all teens needing smartphones for his debate class. Read the paragraphs from the student's essay and the directions that follow.

In this day and age, all teens need smartphones because they provide safety and an excellent source for research. Many may say that smartphones are too distracting for teenagers, and could lead to decreased academic performance. Even if this is true, the benefits to safety and research outweigh the minor possibility of distraction. First, many teens are driving themselves or riding with friends. Smartphones can help these teens get accurate, fast directions so they do not get lost or find themselves in dangerous areas. Also, smartphones can provide teens with an immediate way to look for resources to help them if they are in danger, such as police department phone numbers or park ranger contact information. Smartphones keep teens safe in ways that simple cell phones cannot.

In addition to the safety they bring, smartphones are also an excellent resource for research for teens. So many classes in school require research, and, if teens have smartphones in their pockets to use for research, they can save time and money that would be required to visit a library or buy resources online. A smartphone gives teens quick, reliable information at their fingertips.
The student found more information. Which piece of evidence supports the student's claim about the necessity of smartphones for teens in his essay?

Responses
A) Smartphones are more expensive than regular cell phones and often require a long–term contract.
B) Smartphones are considered much more modern and contemporary than more traditional flip phones or landline phones.
C) Smartphones can be equipped with helpful applications for reliable research sites and can download historical documents, scientific articles, encyclopedia entries, etc.
D) Smartphones come in a variety of colors, can be decorated according to the individual teen's taste, and can download many games to keep teens entertained.