A factory manager hires a specialist to train all new employees on the use of one of the assembly machines. What type of investment has the manager made? (1 point)
O human capital
O technological innovation
O physical capital
O machinery investment

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

answer; i believe the best and correct answer is stronger bonds between the nations of africa;

it should be d or b but i'm sure it's d