The Allen et al. (2017) trial planned to randomly allocate 200 adult smokers with a current or lifetime unipolar mood and/or anxiety disorder to receive either UN cigarettes or RN cigarettes with the nicotine reduced in five steps over 18 weeks. With reference to this trial which of the following statements, if any, are true?

A. The trial is a ‘within‐subjects’ trial because it measures a baseline and an outcome.

B. The trial is double‐blind.

C. The trial is overpowered to detect the effect size given by previous literature.

D. The trial is a superiority trial.

E. One can say the trial is properly randomised.