‘Rivers turned into important waterways and were used to transport goods,’ means

Directions: The passage is followed by five questions. Read the passage carefully and answer the question that follows. For the question four probable answers bearing options (1), (2), (3) and (4) are given. Only one out of those is correct. You have to the choose correct answer.

Rivers have always played a dominant role in history. Many civilizations have been built along great rivers. Rivers gave them farmland to grow crops as well as a route to travel and trade their goods with other people. As time went by some rivers turned into important waterways and were used to transport goods to the inner parts of a continent.