Step 1: Understanding circuit training.
Circuit training involves performing a series of exercises in a sequence, targeting different muscle groups with minimal rest in between. It is used to improve overall fitness and endurance.
Step 2: Identifying the correct answer.
(A) R.E. Morgan: Correct. R.E. Morgan, along with his colleague, developed the circuit training method in the 1950s.
(B) Holmer: Incorrect. While Holmer contributed to exercise science, he did not develop circuit training.
(C) Boldemor: Incorrect. There is no evidence linking Boldemor to the development of circuit training.
(D) Bikila: Incorrect. Bikila was an Ethiopian Olympic marathoner, not associated with circuit training.
Step 3: Conclusion.
R.E. Morgan is credited with the development of the circuit training method, making (A) the correct answer.
Final Answer: R.E. Morgan.
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