I think it is indoor plumbing
Answer:
One of the major advantages of the British army was that it was one of the most powerful and experienced armies in the world. During the previous 100 years, the British army had defeated many powerful countries in war, such as France and Spain, and seemed almost unbeatable.
Explanation:
I think A.
The most remarkable feature of Harappan civilisation was its urbanisation. The Harappan places which were small towns, show an advanced sense of town planning. ... System town planning, drainage system, granary, dockyard, public bathing place, use of bricks, buildings, etc.
