I suspect that much of this issue is resolved by looking at how they sought consent for their study, since they had to inform participants about what they were

I suspect that much of this issue is resolved by looking at how they sought consent for their study, since they had to inform participants about what they were going to do to them (though they could have phrased it as, I may do A, or I may do B). Now, they can say, "I may do A, and I may do B, and there is evidence that both are effective"