How did the concepts of zero and the decimal system affect mathematics? These concepts confused many mathematicians.
These concepts were lost after the Gupta Empire fell.
These concepts made multiplication and division easier.
These concepts built on the principles of Roman numerals.

d is the best answer for this question.

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.

early greek culture has had an important impact on government and education. first of all, they established the democratic political systems and procedures we have today. consequently, we inherited trial by jury for example. considering education, greek philosphers, mathematicians set he intellectual basis of different areas of studies. in addition, the alphabet originated from the phoenician alphabet into the one we have today and the first library was built in egypt. moreover, greek culture has an impact in current art, architecture and sports disciplines.

can you put the answers so i can you