单选题：根据下面资料，回答题 The Ostrich The ostrich, the largest bird in the

根据下面资料，回答题
The Ostrich
The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outsidethe actual deserts. Because of its very long, powerful legs and the floating effect of its extendedwings, it is able to run at great speed over considerable distances.
The female ostrich normally produces about twenty eggs every rainy season. When the female ostrich begins to lay her eggs, however, she does not begin in her own nest. Instead she goes off insearch of the nests of neighboring females and lays two or three eggs in each of them. By the time shehas laid eight or nine eggs, she returns and lays the rest in her own nest.
Because of the size of the eggs, the female ostrich cannot lay more than one every two days, so ittakes her three weeks to finish laying in her own nest. During that period, she spends a lot of timeaway from her nest looking for food. And while she is off her nest, other females visit it to lay theireggs amongst hers. By the time she is ready to sit on the eggs to hatch them, there could be up tothirty eggs in her nest, over haft of which are not her own.
The female ostrich can comfortably cover only about twenty eggs when she is sitting on the nestso before settling down she pushes the surplus ten or so eggs out of the nest. The rejected eggs, however, never include any of her own. Each female is remarkably consistent in the size and shape of theeggs she produces, so it is not difficult for her to distinguish her own from those of strangers.
Of all the eggs laid by ostriches, only a very small number hatch into young birds. There aretimes when nests are left unprotected, for there are too few males to sit on all the nests at night. Thusthere are ample opportunities for their natural enemies to raid the nests and eat the eggs. In fact,nearly 80% of the nests are destroyed.But even if a particular female' s nest suffers this fate ,there is
a good chance that one or two of her eggs will be hatched in the nest of one of her neighbors.
The ostrich is known to us as the largest bird in the human history. A．True
A．True
B．False
B．False
C．Not Given
C．Not Given