Ricardo always gets nervous when his professor says the word exam, but he seldom feels the same anxiety when the professor mentions the word quiz. The difference in his response between these two words can BEST be identified as an example of:

The 13th amendment ended slavery in the united states. what would be the best reason congress decided to amend the constitution to make this practice illegal? a) congress felt all women deserved the right to vote. b) congress felt slavery was ethically and morally wrong. 'c) congress believed everyone should have us citizenship. d) congress believed abraham lincoln should have amended the constitution.