Nhận biết (M1)

This 363-mile-long waterway, the longest canal in the US at the time, made it much easier to transport passengers and goods between New York and the Great Lakes. For this reason, __________

Which choice completes the text so that it conforms to the conventions of Standard English?

• A.

  it is often called "the nation's first superhighway."

• B.

  it is often called "the nation's first superhighway"?

• C.

  is it often called "the nation's first superhighway"?

• D.

  is it often called "the nation's first superhighway."