Four research teams each used a different method to collect data on how fast a new strain of maize sprouts. Assume that they all agree on the sample size and the sample mean (in days). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
A- confidence level 95%: confidence interval: 44-46
B- confidence level 95 % confidence interval 43-47
C- confidence level 68% confidence interval 44-46
D- confidence level 99.7% confidence interval 42-48

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