The traditional mode of transport for goods and people across the Brahmaputra River is:

Ferry
Boat
Steamer
All of the above

The correct answer is d) All of the above.

The Brahmaputra River is a major river in Asia that flows through China, India, and Bangladesh. It is the ninth-longest river in the world and the second-longest river in India. The Brahmaputra River is a major transportation route for goods and people. The traditional mode of transport for goods and people across the Brahmaputra River is by ferry, boat, or steamer.

Ferries are the most common mode of transport across the Brahmaputra River. They are used to transport people and goods between different parts of the river. Boats are also used to transport people and goods across the river. They are smaller than ferries and can be used in shallower water. Steamers are used to transport people and goods across the river. They are larger than ferries and boats and can travel faster.

The Brahmaputra River is a major transportation route for goods and people. The traditional mode of transport for goods and people across the Brahmaputra River is by ferry, boat, or steamer.