In 1973, several NYPD officers developed what modern day sport?

In 1973, David A. Walker, then a New York City Police Community Affairs Detective, joined by his partner Detective Ulysses Williams, developed the street game of Double Dutch into the World Class Sport that it is today. With the assistance of the physical education instructors at IS 10, Walker and Williams revitalized the game by developing it into a competitive team sport. On February 14, 1974, the first Double Dutch tournament was held with nearly 600 fifth, sixth, seventh and eight grade students participating.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.