Answer is D.
A, B and C compare "her work" to "Leakey". This is parallelism issue.
D is okay.
E has "discovering" - This extra "ing" is issue.
Hence answer is D
A, B and C compare "her work" to "Leakey". This is parallelism issue.
D is okay.
E has "discovering" - This extra "ing" is issue.
Hence answer is D
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