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.

If an estimator is consistent, an increase in sample size will increase the:
Option A:accuracy of estimates.
Option B:efficiency of the estimator.
Option C:unbiasedness of the estimator.

Answer: A