|Question 23Verbal

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Soil polluted with chromium (a heavy metal) is harmful to many plants and animals, but the plant species Ludwigia prostrata, or creeping water primrose, can thrive in such conditions. ________ as a metal hyperaccumulator, Ludwigia prostrata absorbs a large amount of chromium and sequesters it in its roots and shoots, thereby reducing concentrations of this harmful substance in the soil.
Which choice completes the text with the most logical transition?
By contrast,
A
Nevertheless,
B
Consequently,
C
What's more,
D