The decimal system we use today is the product of this empire's discovery.

The decimal system we use today is the product of Gupta Empire which existed in ancient India. Gupta Empire is characterized by large contrivances and findings that gave to Hindu culture in topics like mathematics.

Therefore, Gupta empire discovered decimal system. Decimal system is utilized in mathematics in order to write numbers and making the calculation. Decimal currency system in which per unit of currency can be distributed into 100, 10 or 1000 sub-units.

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.