<prompt> The minor connector for a mandibular distal extension base should extend posteriorly about ___.Two-third the length of the edentulous ridgeHalf the length of the edentulous ridgeOne-third the length of the edentulous ridgeAs long as possible  <response>: The minor connector for the mandibular distal extension base should extend posteriorly about two thirds the length of the edentulous ridge; this adds strength to the denture base. 