When Conducting an Experiment with 95% Power,failing to Reject the Null

Multiple Choice

When conducting an experiment with 95% power,failing to reject the null hypothesis means that

A) there is no difference between the experimental and control populations.
B) the experiment was poorly conducted.
C) the null hypothesis is true.
D) the chance that the data came from populations with a difference larger than that predicted when calculating power is less than 5%.