Testing for a disease can be made more efficient by combining samples. If the samples from five people are combined and the mixture tests negative, then all five samples are negative. On the other hand, one positive sample will always test positive, no matter how many negative samples it is mixed with. Assuming the probability of a single sample testing positive is 0.05, find the probability of a positive result for five samples combined into one mixture. Is the probability low enough so that further testing of the individual samples is rarely necessary? The probability of a positive test result is (Round to three decimal places as needed.) Is the probability low enough so that further testing of the individual samples is rarely necessary? O A. The probability is not low, so further testing of the individual samples will frequently be a necessary event. O B. The probability is low, so further testing of the individual samples will be a rarely necessary event. O C. The probability is not low, so further testing will not be necessary for any of the mixtures. O D. The probability is low, so further testing will be necessary for all of the combined mixtures