C. it shifts the focus to his difficult childhood. (apex)
The constant rain had turned the soccer field into a mire, filled with slushy mud that would trap your feet and pull you down.
Neither coach wanted to let her team play in such a swamp.
I believe these are the two sentences that show you what more means. Hope I helped!
The transition which could replace the word thus in this sentence is definitely consequently.
Workers bravely set dangerous explosives in the mountains by hand to make passes for railroads, and consequently hundreds lost their lives.
