question: what does navigation require knowing?
choices.text: information east, west, north temperature frequency tuning weathering clouds the mass of the object A hinged joint
choices.label: A B C D E F G H
formatted_question: what does navigation require knowing? (A) information (B) east, west, north (C) temperature (D) frequency tuning (E) weathering (F) clouds (G) the mass of the object (H) A hinged joint