Which of the following is true?
a. a frame is a list of the individuals in the sample being studied.
b. a frame is the population being studied.
c. a frame is the sample taken from the population being studied.
d. a frame is a list of the individuals in the population being studied.

Option A

Explanation:

A sampling frame or simply a frame is basically a sample of individuals under study.

In other words it consist of the list of everything and everyone present in the population.

Population is the term used in general whereas frame referred to a specific category. Thus if the population consist of people from a region then the frame consist of the list of the names of all the people in the population under study.

Thus only option A complies with the fact about frame.

the answer is a quran

it would be d). more resources must be obtained to attain that combination of goods and services