The Atlantic blockade as Germany's best bad option

Was the Battle of the Atlantic Germany's best chance to blockade Britain and keep the United States out of the war?

It was Germany's best available naval option, but actually stopping all merchant traffic was a much harder and probably unattainable condition.

Germany's reliance on Atlantic commerce war reflected the absence of a better naval option. Choosing that strategy did not supply the force needed to stop merchant traffic. A complete blockade demanded far more than occasional successes against shipping, and the exchange doubts that Germany could close the Atlantic route. The strategy made sense within Germany's limited choices, yet its political aim remained beyond reach.