Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

As the t-distribution’s degrees of freedom decrease, the t-distribution most likely:
Option A:exhibits tails that become fatter.
Option B:approaches a standard normal distribution.
Option C:becomes asymmetrically distributed around its mean value.

Answer: A