It might be: end network relationships after you find a job
If you end network relationships after you find a job, you would be automatically considered as rude and that person would no longer contact you in case there is a better opportunity in the future. Because of this, it is important for you to maintain good networking relationship with as many people as you can to accelerate your career.
The main purpose of the detail is to show that recycling is important. Statistic shown by B can help show that recycling is not deemed important but should be.