Which of the following could be classified as a census?
a survey of a percentage of each state’s population about voting choices
a survey of each student in a school about school lunch options
a survey of all the children in a supermarket to determine the favorite cereal brands of the general population
a survey of all the women on main street to determine the current movie preferences of all people over age 20

The answer to the given question above is the last option: a survey of all the women on Main Street to determine the current movie preferences of all people over age 20. This can be classified as a census. So when we say census, this refers to a population survey and mainly, it focuses on a variety of details regarding the individuals. As you can see in the example, it is the women in a particular location who are asked of their preferences in movies.

The correct answer is 
B.)a survey of each student in a school about school lunch options

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Letter a i would say