The correct answer is c.Because it’s given lots of information so I would suggest c.
Trajan helped rome reach its peak
Their thoughts can't be hundred percent sure without the diaries but they had thoughts on how much hardship they would have to go through the trip across mountains and rocky paths, they also had to survive with minimal resources, so their thoughts on this was probably brave and rough trip, they had no clue if they were gonna survive or what was gonna happen, they territory was unknown.
We started using electricity in everyday life as technology is omnipresent and also represents an important aspect of our life. We started driving cars as the technology has been developed in the 19th century. We've started 'living' online as we have embraced the existance of the internet.