1.

Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select option No substitution required.The orca population of South Africa is less well studied than the one of California, in part because humans rarely encounter them.

A. No substitution required
B. are less well studied than
C. are lesser well studied then the one
D. is less well study than the one
Answer» B. are less well studied than


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