Question

Why ________ I care about your problems? * can should must could

Answer 1

Why should I care about your problems?

• In the sentence mentioned in the question, should is the correct word which will fit in the sentence.
• Should is often used in sentences which represent a recommendation or an opinion of a person. The word should is also used to ask questions.
• Other options, like could, is not correct because could is used in a questions when we have to ask someone to do something and we know, the question statement does not represent this.