What invention greatly expanded the usefulness of electricity?

there were two technological innovations that profoundly changed daily life in the 19th century: steam power and electricity. The railroad helped expand the U.S.. The telegraph, the telephone, and the typewriter brought people together that were far away.

Explanation:

if i knew what was the answer i wouldve put it

c. the king has significantly abused the colonists' rights many times over a long period of time.