In which of the following pairs was the second development dependent on the first development?
A. Invention of internal combustion engine; English railroad boom
B. Introduction of assembly line ;invention of automobile
C. Development of Bessemer process ; construction of first iron bridge
D. Invention of dynamo sending of first telegraph msg

Respuesta :

D. Invention of the dynamo sending of first telegraph message 
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Answer: D

Explanation:

The dynamo sent the first telegraph message