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

Problem: find the area of a rhombus one side of which measures 20 cm and one diagonal is 24 cm . 
Options: a ) 370 cm 2 , b ) 365 cm 2 , c ) 380 cm 2 , d ) 384 cm 2 , e ) 394 cm 2
d

Problem: a voltage will influence current only if the circuit is : 
Options: ['a ) 2', 'b ) 7', 'c ) 6', 'd ) 889', 'e ) 1']
b

Problem: the volume of a certain substance is always directly proportional to its weight . if 48 cubic inches of the substance weigh 114 ounces , what is the volume , in cubic inches , of 63 ounces of this substance ? 
Options: a ) 27 , b ) 26 , c ) 42 , d ) 64 , e ) 147

b