What Was the Significance of Bloom's (1964) and Hunt's (1961)

What was the significance of Bloom's (1964) and Hunt's (1961) research studies?

A) It indicated that genetic predeterminism was the deciding factor in the distribution of intelligence among individuals.
B) It showed that intelligence was fixed at the time of birth.
C) Instead of intelligence being fixed at the time of birth or solely determined by genetics, intelligence was shown to be greatly influenced by environment and experience.
D) Children did not need to grow up significantly delayed if they were provided with appropriate stimulation early in life.