Nhận biết (M1)

In a given rock formation, Rhaetian rock from 208.5 million years ago might directly abut Lochkovian rock from 419.2 million years ago, with millions of years of material missing in between. __________ time did not stand still during these intervening years; the unaccounted-for sedimentary material was likely removed from the stratigraphic record via erosion and weathering.

Which choice completes the text with the most logical transition?

• A.

  As a result,

• B.

  In particular,

• C.

  Of course,

• D.

  On the contrary,