问题详情

Some grasses and flowers can survive in the desert because ______.
A．they need little water for their survival
B．they bear long roots and the seeds are fit for dry weather
C．they stay in the form. of seeds to wait for the right amount of water
D．with long roots, they do not depend on the shoot system to get enough water请帮忙给出正确答案和分析，谢谢！