Corrections and explanations to your grammar and word usage errors. (1...ldquo;which is” can be omitted (in order) to prevent themselves from being regarded as...
Explanation to questions:- 1-C--lined with,adj,--trudged=walk laboriously. 2-A--Although (yet) 3-A--inevitably=adv=unavoidably. 4-B--While 5-C--come out
...also use "see" that has the same usage as "watch" in the explanation to let you feeling the reason. Hopefully, I can get it.