Tim Was Planning for a Meeting with His Boss to Discuss

Multiple Choice

Tim was planning for a meeting with his boss to discuss a raise in his annual salary.In preparation,he wanted to use the Consumer Price Index to determine the percentage increase in his real (inflation-adjusted) salary over the last three years.Which of the four methods of data collection was involved when he used the Consumer Price Index?

A) Data distributed by an organisation or an individual.
B) A designed experiment.
C) A survey.
D) An observational study.