Are you old enough to remember the TV game show "Let's Make a Deal"? Monty Hall would approach an audience member (usually dressed up like a fairy princess or a canned ham) and, with his impossibly long microphone, ask them to choose between door number one and door number two. One of the doors usually featured a nice prize (say, some avocado-colored kitchen appliances). Behind the other door? Usually an ostrich pulling a cart or some such thing.
In the Deuteronomy passage for this teaching, Israel's great Covenant Keeper gives His children a choice between two extremes, but in this case He doesn't hide the "prizes" behind closed doors. He makes the choices crystal clear.