In each question below, two sentences or parts of sentences are given with two blank spaces between them. From among the three parts/sentences given below, pick two which can fill up the blanks to meaningfully complete the sentence.
Based on scientific research, scientists conclude that (____) (____), they will live even more than a hundred years.
(A) keep themselves active all through
(B) exercise more, ensure proper vitamin intake,
(C) human species, if regulate their diet,