What is the primary role of scientific evidence when evaluating an athlete's performance?

To make the investigation last longer.

To confirm the athlete's popularity.

To objectively test different explanations.

To create a detailed report for the athlete's fan club to read.

A scientist investigating potential cheating in sports might look for a "biological marker." What is the best definition of a biological marker in this context?

The brand of equipment the athlete uses during competition.

A measurable indicator in the body pointing to a biological condition.

A news article written about the athlete's past performances.

The official ranking of the athlete within their sport's governing body.

Eyewitnesses are usually not experts.

Biological markers are objective and measurable.

It is easier to get a warrant for biological data.

Training regimens are too complex for anyone to observe accurately.

Disqualify the swimmer as a precaution.

Analyze biological samples for evidence of the drug.

Interview the coach about the new training method.

Measure how much faster the swimmer was than their competitors.

To prove the athlete is more talented than others.

To find definitive proof of artificial enhancement.

To create a public record of the athlete's training.

To show that hard work is not enough to win at the elite level.