The book industry was slow to develop after the Revolutionary War because books were still expensive and literacy remained a luxury. But in a movement that began before the Civil War, came to most states by 1900, swelling the number of readers.

Compulsory education came to most state by 1900.

Explanation:

The Revolutionary War (1775 - 1783) was due to increasing tensions between residents of Great Britain's 13 North American colonies and the colonial government. British soldiers and minutemen exchanged gunfire which signaled the start of the American Revolution and led to the creation of a new nation.

The war is important because the 13 American colonies fought for independence from British rule to become the United States. After the war, book industry were slow to develop because of the cost and high level of illitracy.

Before the Civil war, education was made compulsory in most states by 1900. This movement drastically increased the number of readers, thus a high growth of the book industry.

a is correct

hope this let me know if it is right

question is unclear.

i can't sorry.

post the full question so i can .