The invention of the telephone made what form of communication obsolete
during the American Industrial
Revolution?
A. the phonograph
B. the telegraph
C. the steam engine
D. the skyscraper

What was zheng he’s most important accomplishment? zheng he spread chinese ideas and brought wealth to china from his travels. zheng he commanded an impressive fleet of ships. zheng he sailed the indian ocean and around africa. zheng he conquered lands as far away as africa to increase the dynasty’s power.