BC/AD hope this might help
The answer to this question is the ARCH and CONCRETE. Arch is
a curve structure that was used by the Ancient Romans. Arches have different
forms that produce vaults and arcades. While concrete is a composite material
that is formed by mixing of cement and by sand, gravel, or stones.
Yes. Because the Spanish colonies had once claimed California as it's territory the areas was apart of Mexico in 1821 but had won it's independence in 1848.
Source: The Spanish Empire then claimed it as part of Alta California in their New Spain colony.
D. Native Americans were treated poorly and forced to work for Spanish business operations<span />
