The headmistress is like the principal. The supervisor supervises the principal and all other associates staff members. Hope this helps!
I would say the correct answer would be Alex is his brother since the way the statement is worded, first it talks of his sister, then of his brother Jerry and next his sibling, Alex so since it comes right after the mention of his brother Jerry I would think Alex would be a brother though I can't prove it .
Select the 2nd and 4th option.
