Which of the Following Is Used to Calculate the Degrees

Multiple Choice

Which of the following is used to calculate the degrees of freedom for the A x B interaction?​

A) ​df_{between. treatments} - df_A - df_B
B) ​df_A - df_B
C) ​df_within - (df_A + df_B)
D) ​df_{between. treatments} - df_{within treatments}