Final answer:
Eadweard Muybridge is associated with pivotal advancements in photographic shutter speed due to his experiments with sequential photography, capturing motion in his famous 1878 work, The Horse in Motion. While the creation of shutter speed is a cumulative advancement, Muybridge's contribution to its practical application makes him a significant figure in this context.
Step-by-step explanation:
The creation of shutter speed was not the work of one individual but rather the result of technological advancements in photography over time. However, English photographer Eadweard Muybridge is often associated with breakthroughs in capturing motion due to his use of rapid sequences of photographs to study movement, such as in his famous 1878 work, The Horse in Motion. In fact, Muybridge's experimental photography helped to demonstrate and leverage the capabilities of shorter shutter speeds by capturing a horse's gallop, proving that all four of its legs are off the ground at certain points during the stride. While choices A) Thomas Sutton, B) Edwin H. Land, and C) George Eastman all made significant contributions to photography and camera technology, D) Eadweard Muybridge was integral in the use and demonstration of rapid shutter speeds in his motion studies. Therefore, the correct answer to the question 'Who created shutter speed?' in the context provided would be D) Eadweard Muybridge.