Japanese scientists
studying the frilled cusps of
Baikal seals had founded evidence which suggested that the frills evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean, the seals would evolve into whale-like giants.
(A) Baikal seals
had founded evidence which suggested that
the frills evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean
(B) Baikal seals
has found evidence which suggest that
the frills evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean
(C) Baikal seals
found evidence which suggests that
the frills evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean
(D) Baikal seals
found evidence which suggests that
they evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean
(E) Baikal seals
have found evidence which suggests
they evolved to feed on Macrohectopus branickii and that if re-introduced to the ocean
Studying is a continuous action, the findings will be after the studying action.
had/has/have is wrongly depicting done action in past.
Eliminate A, B, and E.
"they" is ambiguous since it is not depicting whether it's representing scientists, seals, or something else.
Eliminate D and E.
Answer is C