Beginning at 6 months of age, why do infants from developing countries lag behind in their growth compared to infants from developed countries?
a. They have reduced access to medical care.
b. Their mothers carry them more, which thwarts their growth
c. Their fathers put the infants to walk as soon as they begin crawling
d. They begin eating more solid food, which is protein deficient
D. Starting around six months of age, children in developing countries begin eating solid food as a larger part of their diet and, thus, receive less protein and begin to lag in their growth.
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