One of pacal the great's most important accomplishments was that he:
a. initiated the joining of the maya and zapotec civilizations.
b. invented the reaper, which led to a great expansion of maya agriculture and wealth.
c. presided over the construction of many great maya buildings.
d. established teotihuacán as the capital of the maya empire.

C -Presided over the construction of many great Maya buildings.

One of Pacal the Great's most important accomplishments was that he presided over the construction of many great Maya buildings.

Elaborate sculptures were constructed by the Maya by using hard stone tools to make sculptures out of the soft stones. No metal tools were used by the Maya.

C. Presided over the construction of many great Maya buildings.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

i see, would you mind putting it as one?