Nhận biết (M1)

Soil polluted with manganese (a heavy metal) is harmful to many plants and animals, but the plant species Typha latifolia, or broadleaf cattail, not only thrives in such conditions but also helps remediate them. As a metal hyperaccumulator, Typha latifolia absorbs a large amount of manganese and stores it safely in its roots and shoots; __________, manganese concentrations in the soil decrease.

Which choice completes the text with the most logical transition?

• A.

  in contrast,

• B.

  for example,

• C.

  in turn,

• D.

  specifically,