In the United States,the Average Age of Menarche

question 8

Multiple Choice

In the United States,the average age of menarche

• A)has increased rapidly over the last century.
• B)has declined significantly since the mid-nineteenth century.
• C)is likely to decrease substantially in the coming decades.
• D)has remained unchanged over the last century,except for a slight increase in the incidence of precocious puberty.