Carlson notices that a friend is acting different than usual and the friend does not seem to realize that her behavior is odd. this makes carlson feel concerned. carlson's friend may be experiencing

The person is likely to experience change. In which the individual or something is likely to become more different than previously and Carlson’s friend may have change without his friend noticing it and Carlson find his friend’s change to be evident.

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 is b shrapnel injuries