Which of the Following Situations Does Not Need Written Consent

Multiple Choice

Which of the following situations does not need written consent from the participants and their families?

A) A researcher wants to interview tenth grade students about their study habits.
B) A researcher wants to administer a survey to middle school students about their television viewing at home.
C) A researcher wants to observe the natural play interactions of children on the playground in a public setting.
D) A researcher wants to give a short questionnaire to twelfth grade students about their extracurricular activities.