For me, the testing point was "...that measure", so C and D were out. In A, "measuring" is a modifier but it is not clear what it was modifying (the Kuiper belt or the icy objects), so A is Out.
Between B & E, E is out because of it's distorted meaning where it suggests that Pluto is prompting the IAU. so by POE, B is the answer.
Between B & E, E is out because of it's distorted meaning where it suggests that Pluto is prompting the IAU. so by POE, B is the answer.
