Animals become indifferent to their young as soon as their young

Animals become indifferent to their young as soon as their young can look after themselves, but human beings, owing to the length of infancy, find this less easy.
A、Animals are not different with their children when their children grow up, but human beings are the same with their children.
B、Animals do not care about their children as soon as they can look after themselves. This is similar to human beings.
C、Animals do not care about their children as soon as they can look after themselves,but it is difficult for human beings to do so, because the period of infancy is too long.
D、Both animals and human beings are indifferent to their children as soon as their children grow up, but the infancy of human beings is too long.
【正确答案】：C
【题目解析】：此题仅仅考查对句子含义的理解。根据句意，当幼仔会自己照顾自己的时候,动物们就放手不再养育它们了，但是要人类这样做很难，因为人的幼年期大长了。由此可直接排除选项A、B、D。答案为C。