Recently discovered gravitational lensing around certain proximate sta

Instead of is for replacement.
rather than is for comparison so we use rather than
option B nicely explains by mentioning the type.So B is the winner

+1 for B.

(A) rather than developing incidentally from

(B) rather than a type that developed incidentally from --> Correct, idiom usage "X rather than Y", and conveys intended meaning

(C) rather than a type whose development was incidental of

(D) instead of developing incidentally from

(E) instead of a development that was incidental of

Hence, B.

In option B, "that developed incidentally from...." is it correct? shouldn't be "that was developed....."?
Please explain.

MANHATTAN REVIEW OFFICIAL EXPLANATION:

The first thing you should consider here is whether to use rather or instead. Instead does not have an element of choice in it, merely an element of replacement. You would say, for example: I went instead of Jack. You would also say: He is a weak man rather than a timid man. Because this is not a case of replacement, you need the word ‘rather’. That leaves us with choices A, B and C as possible answers. A correct comparison is required. The planets are a ‘phenomenon... rather then a type’. You are correctly comparing two nouns so A can be eliminated. ‘Incidental of’ is an incorrect structure. ‘Incidental to’ is correct. Therefore only B is eliminates all these errors and is the correct answer.

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