Why Did the Increased Availability and Consumption of Dietary Protein

Why did the increased availability and consumption of dietary protein in post-World War II Japan result in taller children?

A) The dietary protein increased potassium levels in the bones, allowing the bones to produce higher amounts of the growth factor hormone.
B) The growth factor hormone relies on dietary protein to build the bones and muscles.
C) The dietary protein increased the size of the hypothalamus, resulting in greater growth factor hormone release.
D) The gonads were able to utilize the increased protein to release growth factor hormone in higher amounts.