Ninety-two-year-old henry is watching his 26-year-old grandson play a video game that involves a military-style shootout. henry challenges his grandson to a round, but a few minutes into the game, henry becomes frustrated, mutters something about his fingers not working fast enough, and decides to quit. henry's inability to keep up with his grandson's quick game play is best explained by the
a. peripheral slowing hypothesis.
b. generalized slowing hypothesis.
c. shortening of reaction time.
d. increased speed of processing time.

a) Peripheral slowing hypothesis.

Explanation: Peripheral slowing hypothesis is the theory that states about outer nervous system's processing and functioning speed starts to slow down. This is caused due to changes in nerves of the brain due to ageing that slows the process of communication with organs and muscles.

According to the situation of the question, Henry's slow processing of finger is due to the old age as compared to his grandson which has declined the functioning of his nerves with the muscles and organs

Other options are incorrect because generalized slowing hypothesis  is slowing process of age due to cognitive factors. Reaction time shortening is the slow response .Fast speed of processing time is quick speed in processing any information for body functioning.

Thus, the correct option is option(a).    

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