A major approach to "confirming what the data reveal" is the calculation of

D. confidence intervals for a population parameter.

Explanation:

Standard deviation is simply a measure of the amount of dispersion of a set of values from the mean, hence it is not used to confirm what the data reveal.

Stem-and-leaf plots simply shows the frequency with which a set of values occur and hence it is not used to confirm what the data reveal.

A measure of central tendency, also sometimes signifies mean, mode, and median simply represents the typical value or middle point of a set of data, and hence it is not used to confirm what the data reveal

Confidence intervals for a population parameter refers to the probability of population parameter falling between two set values for a certain proportion of times. With the presence of probability, this shows that it is used to confirm what the data reveals.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.