In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Q: Problem: 36 people { a 1 , a 2 , . . . , a 36 } meet and shake hands in a circular fashion . in other words , there are totally 36 handshakes involving the pairs , { a 1 , a 2 } , { a 2 , a 3 } , . . . , { a 35 , a 36 } , { a 36 , a 1 } . then size of the smallest set of people such that the rest have shaken hands with at least one person in the set is 
Options: ['a ) 11', 'b ) 12', 'c ) 13', 'd ) 15', 'e ) 18']

A: b
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Q: Problem: the length of a rectangle is halved while its width is also halved . what is the % change in area ? 
Options: a ) 25 % , b ) 30 % , c ) 50 % , d ) 65 % , e ) 75 %

A: e
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Q: Problem: a rectangle has a perimeter of 176 inches . the length of the rectangle is 8 inches more than its width . what is the area of the rectangle ? 
Options: ['a ) 1,408 square inches', 'b ) 1,920 square inches', 'c ) 1,936 square inches', 'd ) 2,304 square inches', 'e ) none of these']

A:
b
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