单项选择题

阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选出能填入相应空白处的最佳选项。

The elephant is the biggest four-legged animal in the world. It is also, perhaps, the gentlest, but not (41) . Elephants (42) for a long time--fifty or sixty years. They never forget great sadness or great happiness. A female elephant dies, her daughters and her granddaughters are (43) for many months. Elephants live in families--families of females (母系家族). There will be a few young males--" baby boy". But they will soon (44) their families when they grow up. An elephant family (45) only its daughters, mothers and grandmothers. The females stay together all their (46) . The older ones (47) the younger ones. The mothers teach their daughters and set a good example. And (48) happens to male elephants A bull (雄) elephant doesn’t often have a friend. He lives (49) . Sometimes the females call a bull. He can (50) them then, but soon his "wives" and sisters send him away again.