There are 2 couples. If they will sit 4 chairs in a row such that each couple sits side by side, how many possible cases are there?	Choose the correct option.
A) 120  B) 8  C) 1,200  D) 2,460  E) 3,840
Tie the couples. Then we have 2 persons that have to be arranged in 2 places. 2! ways.   Now the couples can change position with each other. 2! ways.   2! * (2!)^2 = 2 *4= 
<gadget id="calculator">2 *4</gadget>
<output>8</output>
8   Answer is 8.
<result>B</result>
There are 2 couples. If they will sit 4 chairs in a row such that each couple sits side by side, how many possible cases are there?