Which factor most promoted the spread of ideas and products from the ancient river valley civilizations of Egypt and Mesopotamia to the Greeks
and Romans

the use of email to replace slower surface mail.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

the united states began searching for a way to reduce oil

-agarvated