Apassive verb is:
a. a verb that allows the subject to receive the action.
b. a verb that indicates slow-moving action.
c. a verb that causes the subject to perform the action.
d. a verb that indicates lazy subjects.

the narrator is saying that the old lady made her feel uncomfortable. you know this because they say "i found that rather irksome", "perhaps it was her being so upright and trim", and "i don't think it was that, because i thought that quaintly pleasant." hope this !

the answer is b b- it makes him angry that malcolm didn't trust him.