Is known for his use of nonsense syllables in his experiments on forgetting.
a. sigmund freud
b. jean piaget
c. herman ebbinghaus
d. harry bahrick

The correct answer is letter C.

Herman Ebbinghaus was a German psychologist who was one of the first to study memory. In his research, he would use associations that were called "nonsense syllables". which is a consonant-vowel-consonant combination in which the consonant is not repeated and the syllable doesn't have prior meaning.

explanation:

he always remember humbleness for other

he was first president born poor

the correct answer is "c: merchants" and "e. soldiers".

the song dynasty was known as the first government in the world to introduce paper currency. it was also the first chinese government which established a permanent standing navy. finally, the first compass was introduced during this period of government.

all of these innovations heavily affected commerce in a positive way. printed money dynamize commerce within the borders of the empire due to an easier way to quantify value during the trade. the introduction of the compass trade routes to be faster. finally, the introduction of a standing navy regulate trade routes.

regarding military affairs, gunpowder was created during this period. this was a tremendous improvement that was widely utilized by the military in order to innovate in the manufacturing of weapons.