Change the following sentences as directed in the brackets. (a) The Nile is the longest river in the world. (Positive) (b) No other river is as historic as the Nile. (Superlative) (c) Some rivers are longer than the Amazon. (Negative) (d) Is the Nile longer than all other rivers? (Assertive) (e) How significant the Nile is in history! (Assertive)