Answer:
C) Members of a breeding population should become more uniform in phenotype.
Explanation:
The blending hypothesis was the hypothesis which suggested that the produced offspring possess the intermediate characteristics of both the parents. This means that if the tall male and short female are crossed then the offsprings will have intermediate height.
This theory was well accepted at the time of Gregor Mendel and the Charles Darwin. This theory has limitation as the breeding population offsprings will have the uniform characteristics and the unformatism will be established.
Thus, Option-C is correct.