According to http://www.theoriginaltoothfairypoll.com/the-original-poll/

Since 1998, Delta Dental has annually conducted the Original Tooth Fairy Poll as a fun way to gauge how generous the tiny fairy had been in the previous year. The poll collects Tooth Fairy average giving and compares it to stock market activity to show how the value of a lost tooth relates to the U.S. economy (Tooth Fairy IndexSM).

Poll answers provide Delta Dental with valuable data that we in turn give to parents so they can discuss and promote good oral health care with their children. Talking about the Tooth Fairy's giving habits makes for a fun and wonderful opportunity to help kids develop positive dental habits at an early age.

More than 1,000 primary caregivers were surveyed via email interviews. The sample was designed to capture a broad spectrum of the U.S. population, not just those with dental insurance.

According to the website in the United States the average amount left by the tooth fairy is $4.13.

1.What is the sample for this scenario.

A.$4.13is theaverage gift amountfrom the more than1,000primary caregivers.

B.The more than 1,000 primary caregivers.

C.All caregivers in the United States.

D.The average gift amount given by all caregivers in the United States.