Which of the following is NOT a requirement of the Combinations​Rule, Subscript n Baseline Upper C Subscript requalsStartFraction n exclamation mark Over r exclamation mark left parenthesis n minus r right parenthesis exclamation mark EndFraction ​, for items that are all​ different? Choose the correct answer below.
A. That r of the n items are selected​ (without replacement).
B. That there be n different items available.
C. That order is not taken into account​(consider rearrangements of the same items to be the​ same).
D. That order is taken into account​ (consider rearrangements of the same items to be different​ sequences).
A. That r of the n items are selected​ (without replacement).
B. That there be n different items available.
C. That order is not taken into account​(consider rearrangements of the same items to be the​ same).
D. That order is taken into account​ (consider rearrangements of the same items to be different​ sequences).