70. The population of Antarctica, a continent covered in ice, is only a fraction ______ population of Iceland, a volcanic island nation. (A)as (B)as is (C)is the (D)as is the

72. Only through the meticulous application of advanced neuroimaging ______ the true extent of the brain's capacity for neuroplasticity, a phenomenon long considered impossible. (A)have researchers been able to fathom (B)do researchers have finally grasped (C)did researchers begin to hypothesize (D)had researchers been capable of elucidating

70. The population of Antarctica, a continent covered in ice, is only a fraction ______ population of Iceland, a volcanic island nation.
(A)as
(B)as is
(C)is the
(D)as is the

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