Answer:
The measure of central tendency that is most affected by extreme values (outliers) is the mean. Outliers can significantly impact the mean because it takes into account the value of each data point when calculating the average. The mean is calculated by adding up all the values and dividing by the total number of values. If there are extreme values in the data set, they can skew the mean towards them, making it an unreliable representation of the central tendency of the data.
So, the answer is:
A. Mean