Mathematics, mostly.
They also did groundbreaking work in the following fields:
Astronomy
Philosophy
Geography
Sciences
Technology
um so im not sure what the answer is cos im doing the same test rn but the question is asking for your opinion on what u think it means so they probably wont count it as incorrect as long as its on topic and makes sense :)
D it was made to make trade quicker and more efficient connecting the two bodies of water
3 is conflict then overrule
If u want it fast here you go
the answer is"<span>a. manufacturing processes"</span>