Which Statement Best Explains Whether Interest Rates Are Positive or Negative

Multiple Choice

Which statement best explains whether interest rates are positive or negative?

A) Real interest rates can be either positive or negative, but nominal interest rates must be positive.
B) Real interest rates and nominal interest rates must be positive.
C) Real interest rates must be positive, but nominal interest rates can be either positive or negative.
D) Real interest rates and nominal interest rates can be either positive or negative.