Why might institutions of authority
tend to reject
new ideas?

Every institution has its own interests and ideas, in some cases some institutions of authority tend to reject new ideas or thinkers because they might shake their structure and system or threat their power.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.