Which of the Following Descriptive Research Methods Is Correctly Matched

Which of the following descriptive research methods is correctly matched with a description?

A) Archival research-in-depth investigation of an individual
B) Naturalistic observation-behavior is investigated in the environment in which it typically occurs,without intervention by the researcher
C) Case study-a sample is asked a series of questions about their thoughts,attitudes,or behaviors
D) Survey research-existing data is examined to test a hypothesis