One key advantage of a test with high objectivity is:

A test with high objectivity is designed to produce reliable and consistent results regardless of who administers it. This consistency across different examiners is crucial in evaluations where fairness and impartiality are important. When a test is objective, it relies on standardized scoring criteria, which minimizes the influence of personal judgment or bias on the outcomes. This leads to more dependable results that can be trusted for making important decisions.

The other options, while they may present some benefits in specific contexts, do not encapsulate the primary advantage attributed to high objectivity in assessments. For instance, the need for minimal training or the cost of conducting the test might depend on various factors unrelated to the test's objectivity itself. Additionally, the ability to measure subjective qualities effectively does not align with the essence of objectivity, as such tests are typically designed to assess more quantifiable elements directly. Therefore, the strength of objectivity lies primarily in its capacity to ensure consistent scoring across different evaluators.