Nhận biết (M1)

The geologic principle of cross-cutting relationships states that an intrusion is younger than the rocks through which it cuts. __________ geophysicists analyzing a given rock formation can ascertain that an igneous intrusion that bisects a layer of 358.9-million-year-old Tournaisian rock but not the 303.7-million-year-old Gzhelian rock above it is younger than the former but older than the latter.

Which choice completes the text with the most logical transition?

• A.

  Accordingly,

• B.

  Moreover,

• C.

  To this end,

• D.

  That being said,