Based on a poll 66% of internet users are more careful about personal information when using public wifi. What is the probability that among four random selected internet users at least one is more careful about personal information. 1. The probability that at least one of them is careful about personal information is ____. Round to three decimal places. 2. How is the result affected by the additional information That the survey subjects volunteered to respond? Multiple choice. A. It is very possible that the result is not valid because the sample may not be representative of the people who use public wifi. B. The result should not be impacted by this because volunteers are likely to have the most relevant responses. C. It is very possible that the result is not valid because not everyone uses public wifi. D. The result should not be impacted by this because there is no reason to lie when responding