Which of the following sentences requires a citation?

A. An email to a professor about an assignment

B. A text message to a friend from class

C. A job application for a teaching position

D. A peer new in an academic journal

A. I finished mowing the lawn and I took a long nap

B. My grandfather told me all about his childhood.

C. The shovel was placed against the house.

D. I hid my journal beneath the bed.

A. Any exposed semi susceptible to sunburn

B. Prolonged sun exposure can result in a burn

C. Some sunscreens have an SPF of 35 or higher.

D. One in five Americans will develop skin cancer by the age of 70.