Answer:
geometric grid system
Explanation:
Guptas' period in India is considered as the Indian Golden Age, and was characterized by many sociocultural and scientific advancement.
Some of the scientific advancement of that period includes:
1. Discovery of the seven planets in the solar system.
2. Creation of technology that can detect eclipses of the sun and moon.
3. Discovery of Earth rotation on an axis and revolution round the sun.
Hence, the technological advancement originated during the Gupta period in India is GEOMETRIC GRID SYSTEM.
The reason that led to the rise of the domestic slave trade was the regional specialization in labor production. The South had a much higher demand of slaves for the labor-intensive cotton plantations. This demand for labor pushed up the prices of the slaves, intensifying the trade.
D.) The workers on the canal were attacked during a rebellion in Panama.