The answer for your question is the letter A.
Answer:
2.1 children per family
Explanation:
When the total fertility rate is at replacement (2.1 children per family), the two children born essentially replace the parents when they die. The replacement level TFR is 2.1, not 2.0, since not all females survive to their childbearing years.
Powers not delegated to the U.S by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
So basically, they are reserved to the states and left up to them to decide.
Answer: The answer is "periodization."