The correct option is this: A CONFIDENCE LEVEL IS THE PROBABILITY THAT SOMETHING WILL FALL WITHIN A CONFIDENCE INTERVAL.
A confidence level refers to the probability that the value of a parameter will fall within a particular range of values.
Confidence level is usually given in form of percentage. A 0% confidence level implies that the probability of getting the same results if an experiment is repeated is zero, while a 100% confidence level implies that, the probability of getting the same results if the experiment is repeated is 100%.