Question

I hate people _________don’t help others when they are in trouble.

A. who
B. which
C. whose
D. where

Answer 1

答案A
考查定语从句的用法。由先行词people 决定定语从句的引导词指人，并且作主语，因此排除B，D。whose“谁的”，用作定语，故选A。

Answer 2

I
hate
people
(who)don't
help
others
when
they
are
in
trouble.
先行词是people，指人，所以关系词用who。
they指代的是others，指代范围是离它最近的成分。
当然，根据句子意思来判断是最好的。希望帮到你！