Scientists previously thought that all electric eels belong to a single species, but a team of researchers led by zoologist C. David de Santana proved this idea wrong by ______ that there are in fact three distinct species of electric eels.
Which choice completes the text with the most logical and precise word or phrase?
Choose 1 answer:
Choose 1 answer:
(Choice A) requiring
A
requiring
(Choice B) demonstrating
B
demonstrating
(Choice C) complaining
C
complaining
(Choice D) pretending
D
pretending