Which of the following statements on the innovations created by ancient cultures is true?

The Incas focused on innovations in transportation, while the Aztecs focused on agriculture.
The Incas focused on innovations in agriculture, while the Aztecs focused on transportation.
The Aztecs focused on innovations in public record-keeping, while the Mayas focused on agriculture.
The Aztecs focused on innovations in agriculture, while the Mayas focused on transportation.

The Incas focused on innovations in agriculture, while Aztecs focused on transportation.

its actually "The Incas focused on innovations in transportation, while the Aztecs focused on agriculture."

Explanation:

i took the test

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.