Census data is widely used by:

Researchers
Government agencies
Businesses
All of the above

The correct answer is D. Census data is widely used by researchers, government agencies, and businesses.

Researchers use census data to study a variety of topics, such as population growth, poverty, and education. Government agencies use census data to make decisions about how to allocate resources, such as funding for schools and hospitals. Businesses use census data to make decisions about where to locate their stores and offices, and to target their marketing campaigns.

Census data is collected every 10 years by the United States Census Bureau. The data is used to create a profile of the United States population, including information on age, sex, race, ethnicity, housing, and employment. The data is also used to apportion seats in the U.S. House of Representatives and to draw congressional districts.

The census is a vital tool for understanding the United States population and for making informed decisions about how to allocate resources and address public policy issues.