_____ of the land in that district _____ covered with  tall trees and green grass. [ ]

A. Two fifth, is

B. Two fifth, are

C. Two fifths, is

D. Two fifths, are

所谓证券市场监管，是指证券管理机关运用法律的、经济的以及必要的行政手段，对证券的募集、发行、交易等行为以及证券投资中介机构的行为进行监督与管理。