The correct answer is b. It is used in construction, bridge building, privacy screens, food, and decoration.
Many things in China are built out of bamboo. It grows rapidly and is extremely durable, under right conditions even withstanding what steel can withstand.
The question will be more answerable if the entries are there.
Many settle in Phoenix Az or Arizona in general
Texas
New Mexico and California
The Mexican society wasn't united, since they were constantly fighting with each other. Since soldiers were killed, they also lost military power. When the Spanish arrived, they had a strong military, but also diseases, which killed Mexican soldiers. That made the home society vulnerable.
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It should be D. Hope that helps.