I think the leader ship was the cause of collapse.
Answer:
B, Public spending on education.
Explanation:
If a county's has a free and public education system the more children have access to knowledge which will promote high development rates within the country.
Based on the information given, the overconfidence effect is a bias which indicates that the confidence of the teacher is greater than the accuracy of the judgements.
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What is a bias?</h3>
A bias simply means a prejudice against a particular person or group. A mental set simply means the ability of the brain to stick to a particular thing and ignore other alternatives. In this case, the teacher sticked with only what he was told.
The confirmation bias simply means a prejudice against someone. This is unfair towards the person.
Learn more about bias on:
brainly.com/question/4540984
16) D
17) D
18) C
I suggest to look up the definitions of words you do not know to compare meaning. This is only a test of how well you know the meanings of all of these words.