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Paleontologists studying the fossil record have estimated that the current collection of known fossils accounts for only approximately 10% of all species that have ever existed.
A. studying the fossil record have estimated that the current collection of known fossils accounts for only approximately 10% of all species that
B. that study the fossil record have estimated that the current collection of known fossils is only 10% of all species that
C. studying the fossil record have estimated that the current collection of known fossils accounts for only 10% of all species that
D. who study the fossil record have estimated that the fossils currently collected are only approximately 10% of all species which
E. who study the fossil record estimate that the current collection of known fossils accounts for approximately 10% of all species which
OA C
Source: Princeton Review
A. studying the fossil record have estimated that the current collection of known fossils accounts for only approximately 10% of all species that
B. that study the fossil record have estimated that the current collection of known fossils is only 10% of all species that
C. studying the fossil record have estimated that the current collection of known fossils accounts for only 10% of all species that
D. who study the fossil record have estimated that the fossils currently collected are only approximately 10% of all species which
E. who study the fossil record estimate that the current collection of known fossils accounts for approximately 10% of all species which
OA C
Source: Princeton Review
