我国自古以来就是一个多民族国家。新中国成立后，实行的解决民族问题的基本政策是 [ ]

A．民族团结

B．民族平等

C．民族区域自治

D．发展少数民族

In a certain flower shop, which stocks four types of flower there are

as many violets as carnation，and

as many tulips as violets．If there are equal numbers of roses and tulips，what percent of the flowers in the shop are carnations