Which Can Be Considered a Feature of the Place-Learning Task

Which can be considered a feature of the place-learning task? (Select all that apply.)

A) The platform remains in the same location in each trial.
B) The platform is visible to the rodent.
C) For each trial, the rodent is released from the same location inside the pool.
D) The platform is visible in the first trial but made invisible in subsequent trials.
E) None of the above