Hey there,
Your question states: <span>How did the calculation of pi help mathematicians during the Gupta period?
My best guess that I would give would be the option B. </span><span>
The value of pi helped them explain that Earth is a rotating sphere. Because they used the </span>

to help them, just as we use that in math.
Hope this helps.
~Jurgen
1-the introduction of New World crops
2-the new ideas
3-less Europeans died after the exchange
It is true. Because no one wanted to take the rugged journey all the way across the united states, especially because there was no continental railroad yet.