TPO5 的阅读问题

FannieHsuUID: 2861996

请大家帮忙解答一下这道句子简化题：

我觉得我整个句子的逻辑都没有搞清楚，希望大侠赐教！做的时候觉得下面的选项，没有一个对的。。。
Paragraph 6: Only recently have investigators considered using these plants to clean up soil
and waste sites that have been contaminated by toxic levels of heavy metals – an environmentally
friendly approach known as phytoremediation. This scenario begins with the planting of hyper
accumulating species in the target area, such as an abandoned mine or an irrigation pond
contaminated by runoff.Toxic minerals would first be absorbed by roots but later relocated to the
stem and leaves.

Which of the sentences below best expresses the essential information in the highlighted
sentence in the passage? Incorrect choices change the meaning in important ways or leave out
essential information.
A.Before considering phytoremediation, hyper accumulating species of plants local to the
target area must be identified.
B.The investigation begins with an evaluation of toxic sites in the target area to determine the
extent of contamination.
C.The first step in phytoremediation is the planting of hyper accumulating plants in the area
to be cleaned up.
D.Mines and irrigation ponds can be kept from becoming contaminated by planting hyper
accumulating species in targeted areas.

russleUID: 2918675

This scenario begins with the planting of hyper7 V6 ]$ O; Z+ C: y! P, ]- p
accumulating species in the target area,   我刚做的TPO5,我做的时候主要是看了我加黑的两个点确定的答案

FannieHsuUID: 2861996

2# russle
那你是怎么确定这两个点的？

huaimingyunUID: 2943676

答案是C吗