Picking the right prior

You continue working on your task to estimate the new drug's efficacy, but with the small data sample you had, you know there is a lot of uncertainty in your estimate. Luckily, a couple of neighboring countries managed to conduct more extensive experiments and have just published their results. You can use them as priors in your analysis!

Having browsed all the publications, you conclude that the reported efficacy rates are mostly between 70% and 90%. A couple of results below 50% were recorded too, but not many.

Which of the following distributions captures this prior information best?