5 All of the following flourished during both the Tang and the Song dynasties, except
A art and culture.
B sea voyages of exploration.
C science and technology.
D trade.

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.