The antidote to these problems is hard to find.

Answer: Option A

Remedy : a means of counteracting or eliminating something undesirable.
Consequence : a result or effect, typically one that is unwelcome or unpleasant.
Cause : a person or thing that gives rise to an action, phenomenon, or condition.
Result : a thing that is caused or produced by something else; a consequence or outcome.
Antidote : something that counteracts an unpleasant feeling or situation.

Synonym of Antidote is Remedy