Once considered the ninth planet in the solar system, Pluto

[BTGmoderatorDC]

Once considered the ninth planet in the solar system, Pluto was discovered in 1930, lost its planetary status in 2006, which prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt measuring 100 kilometers across or more.

A. Once considered the ninth planet in the solar system, Pluto was discovered in 1930, lost its planetary status in 2006, which prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt measuring

B. Discovered in 1930 and once considered the ninth planet in the solar system, Pluto lost its planetary status in 2006, a development that prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt that measure

C. Discovered in 1930, Pluto, once considered the ninth planet in the solar system, lost its planetary status in 2006, a development prompting the International Astronomical Union (IAU) to create a new definition for the term 'planet', now categorized as just one out of 70,000 icy objects in the Kuiper Belt to measure

D. Pluto, discovered in 1930 and once considered the ninth planet in the solar system, lost its planetary status in 2006, a development that prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', is now categorized as just one out of 70,000 icy objects in the Kuiper Belt to measure

E. Discovered in 1930 and once considered the ninth planet in the solar system, Pluto lost its planetary status in 2006, prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt that measure

OA B

Source: e-GMAT

[deloitte247]

Point to ponder: I think the key with this kind of question so nested and convoluted is to try figure out a critical point on which you can choose ( too bad if its wrong, just pick an answer and move on.)

Option A :- INCORRECT
Incorrect use of which. We need to refer to the event "lost its planetary status in 2006". Also, 'lost its planetary status in 2006 should be used with the subject and not used as a modifier.

Option B :- CORRECT
Option wee written, follows concord and parallelism.

Option C :- INCORRECT
The subject of the second clause is not specific, this brings uncertainty about this option.

Option D :- INCORRECT
Option contains incorrect verbs are not connected properly. Need "and" to separated two verbs.

Option E :- INCORRECT
Prompted the international Astronomical Union (IAU)
the development promoted
verb-ed modifier prompted is not used correctly.