A part of sentence is bold. Below are given alternatives to the bold part at (A), (B) and (C) which may improve the sentence. Choose the correct alternatives. In case no improvement is needed your answer is (D).

Q:

The Naga tribes have been known for their pride in their distinct identity.

• 1
  has been known for their pride and in their distinct identity
• 2
  was being known for their pride in their distinct identity
• 3
  are known for their pride in their distinct identity
• 4
  No improvement