The scientific method is a series of steps followed during scientific investigations, with the objective of testing possible answers to the questions asked.
Some of the steps in this method are:
-Observations
-Questions
-Research of the background
-Hypothesis
-Testing of the hypothesis or experimentation
-Analysis of data
-Results
-Conclusions
We can compare the options with this.
a) That the results are believable is a somewhat ambiguous characteristic, so is not very useful to describe the components of the scientific method.
b) That the results can be verified or tested is indeed a characteristic of the scientific method, as the results should be replicable to be considered valid.
c) The measurement is important for the results to be objective, so this is also describing the scientific method.
d) It's not strictly necessary that what we are testing can be detected by senses, because in some cases the subjects of the scientific method cannot be observed directly by humans, but we can use equipment to be able to detect them.
So, in this case, B and C would be the correct answers.