|Question 16Verbal

Source Texts

Text
A number of scientific phenomena have been named after nineteenth-century Czech physiologist Jan Evangelista Purkinje, including the Purkinje effect, which ____ the eye's tendency to perceive objects as blue tinted in low-light conditions.
Which choice completes the text so that it conforms to the conventions of Standard English?
has been
A
will have been
B
was
C
is
D