Because they are small which are not suitable for transportation but still some rivers have that facility
Hope it helps
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The correct answer is letter D.
To address the economic and social crisis in the US, Roosevelt used the work of a group of renowned Keynes-inspired economists to design the New Deal, whose main objective was to create conditions for lowering unemployment through the articulation of state and private investment. The main measures were:
devaluation of the dollar to make exports more competitive;
loans to banks to avoid bankruptcies in the financial system;
creation of the social security system, with emphasis on unemployment insurance and the 1935 Insurance Act;
right of union organization;
stimulation of agricultural production;
construction of a large amount of public works, especially hydroelectric and highways.
