Responding to the public’s fascination with―and sometimes undue alarm over―possible threats from asteroids, a scale developed by astronomers rates the likelihood that a particular asteroid or comet may collide with Earth.
(A) a scale developed by astronomers rates the likelihood that a particular asteroid or comet may
(B) a scale that astronomers have developed rates how likely it is for a particular asteroid or comet to
(C) astronomers have developed a scale to rate how likely a particular asteroid or comet will be to
(D) astronomers have developed a scale for rating the likelihood that a particular asteroid or comet will
(E) astronomers have developed a scale that rates the likelihood of a particular asteroid or comet that may