What happens next in this paragraph?

How to be a successful salesperson
Love your job.
You'll never succeed in sales, or in any job, if you don't love what you do. The best salespeople love the struggle of gaining sales leads, talking and listening to prospects, and closing the sale.
Select from: I. They love success even when its not easy. It takes people who are already amazing in this area of sales to be capable of pushing through obstacles. II. Don't let yourself doubt yourself or think that your sales skills will improve. Never ever be hesitant to challenge yourself and think that all your methods fail. III. Time yourself to spend time with your one passion, and make sure that you're on good terms with those people. Many independent salespeople start their careers working on growth opportunities and creating new and exciting ideas. IV. Only by truly wanting to be there can you put in the extra work and effort required to be the best of the best. If you don't already love your job or the product you are selling, quit and sell something else.
IV.