B because allowing someone in on your story will make them more comfortable and the chance they will share theirs is more likely
D. his mother was involved in his fathers murder
A parallel sentence mentions the same grammatical expression twice. I would go with "D". 'Passed' and 'Demonstrated' are both past tense words that express the same past tense grammatical idea.
If you have more questions, feel free to ask me.
C. From the looks of fear and distrust, he would have guessed that before long his arrival would be the talk of the whole town. He saw nothing of all this. People with trouble do not look behind.