In the USA today internet poll 73 percent of readers indicated that they were satisfied with their lives.

1. 73 percent of readers are satisfied with their lives.

A. The population B. The sample

C. a population statistic D. a sample statistic

c) Population parameter or Population statistic

Step-by-step explanation:

Population:-

The totality of observation with which we are concerned, whether this number be finite or infinite is called population

Sample:

A sample is subset of a Population

Given data the USA today internet poll is called Population

Given data 73 percent of readers are satisfied with their lives.

This is called Population parameter.