Which of the Following Statements About Sample Size Is TRUE

Which of the following statements about sample size is TRUE?

A) All else being equal, larger sample sizes provide more statistical power.
B) The smaller the sample size, the more likely one is to be able to detect a small effect of the independent variable.
C) Two-tailed tests require smaller sample sizes than one-tailed tests.
D) Studies that set lower alpha levels require smaller sample sizes than studies using higher alpha levels.