Fifty-year-olds can expect to retain ______ percent of the muscle strength they had at age 20

Charles Darwin was the original theorist who suggested social Darwinism

Indicate whether this statement is true or false.

Although their pronunciation of words is not as precise as it will become later, at what age can most toddlers speak clearly enough to make themselves understood about nearly anything they wish?

a. 1 year b. 2 years c. 3 years d. 4 years