Answer:
a. Hermann Ebbinghaus
Explanation:
Hermann Ebbinghaus (1885) was a German Psychologist who introduce the experimental study of memory, using himself as the single subject in his work.
It is closely associated to absolute thresholds. Signal detection theory is used when psychologists want to measure the way we make decisions under conditions of uncertainty, where reasoning and decision making takes place during indecisive situation. One scientific example could be when an observer categorized something present or absent.
Answer:
The correct answer is Agriculture
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Explanation:
A. Labor to grow cash crops and the Indians were poor workers