Sentence Correction (SC) | Re: Responding to the publics fascination with-and sometimes

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