单项选择题

According to the passage, which of the following is TRUE of male dik-dik

A．He can in principle defend more than one female.
B．He practices monogamy.
C．He invests heavily in his offspring.
D．He is partly monogamous and partly polygamous.

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单项选择题

We can conclude from the first two paragraphs that whether a male practices monogamy of polygamy depends on ______.

A．the amount of nurturing the young
B．the sex of offspring
C．the attractiveness of his female partner
D．the time of conception