When a dwarf person lifts a dumbbell (performs arm curl), assuming that the weight of the dumbbell is the same and weight of the arm itself proportional to his/her size,
A. He/she uses more energy than an average-size person to do the same work.
B. He/she ends up doing less work than an average size person.
C. Both of the statements are true.
D. Neither of the statements is true.
Answer: B