Which of the following is considered an objective measure?

The correct answer is based on the nature of the measures provided in the options. An objective measure consists of quantifiable data that can be observed and documented, without reliance on personal feelings or opinions.

In this case, "20 times" is an objective measure because it presents a concrete numerical value that can be verified or counted. This type of measurement is definitive, unambiguous, and can be compared against other data points reliably.

In contrast, the other options are subjective in nature. Descriptions such as "I feel the risk is high" and "It seems to be probably dangerous" rely on personal perceptions and interpretations, which can vary from person to person. "The risk fluctuates frequently" is also a subjective statement since it lacks a specific quantifiable element to measure the frequency or extent of the fluctuations. Therefore, they do not meet the criteria for objective measures.