Indian scholars invented all of the following that we use today except .
a. the 12 month calendar
c. the number zero
b. inoculations against disease
d. hindu-arabic numerals

The Indian scholars invented all of the following that we use today except the 12 months calendar.

Explanation:

(A) the 12 month calendar

Explanation:took the test

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.