Answer:
answer B. I'm not even a native speaker, but A or C would sound lunatic
The third one. A person uses another's lack of knowledge as proof his argument is correct.
This may be helpful:
https://literarydevices.net/fallacy/
Answer:
His mother is not acting properly after the death of his father.
Marry Shelly who wrote the gothic novel of Frankenstein
1)solution 2)HM 3)HM 4)Solution 5)HM 6)solution
