According to the Author, the Key Difference Between Deception in Research

According to the author, the key difference between deception in research and covert research is that ________.

A) deception requires consent forms to be signed, while covert research does not
B) deception is usually implemented in small groups, while covert research is best for large organizations or groups
C) deception is always unethical whereas covert research can be ethical
D) deception involves lying, whereas covert research implies the need for protection from potential danger