|Question 21Verbal

Source Texts

Text
Soil polluted with cadmium (a heavy metal) is harmful to many plants and animals, but the plant species Elodea canadensis, or Canadian waterweed, not only thrives in such conditions but also helps remediate them. As a metal hyperaccumulator, Elodea canadensis absorbs a large amount of cadmium and stores it safely in its roots and shoots;        cadmium concentrations in the soil decrease.
Which choice completes the text with the most logical transition?
specifically,
A
nevertheless,
B
in addition,
C
accordingly,
D