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B. Developed advanced medical treatments

Explanation:

I'll use process of elimination here.

The Gupta had less land than the Mauryan Empire did, so A is out.

Both Buddhism (Late 6th century BCE) and Hinduism (1750 BCE?) were formed well before the Gupta Empire came to rise, so C is also out.

The Gupta had trade relations with a good amount of countries, including the Byzantine Empire, so D is also out.

This leaves B, which is true. Gupta doctors used mercury and iron, alongside using herbs for healing.

the answer is c. many americans held nativist or racist views

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: