How does the Pareto principle apply to product development?

Select an answer:

If you work less than $80\%$ of the time then you will have $20\%$ less value

$20\%$ of the time you're working on $80\%$ of the product

Often $80\%$ of your product's value comes from $20\%$ of your efforts

You have to always focus on the $80\%$ of the product