Answer:
Referrals is the correct answer.
Step-by-step explanation:
Referrals is a powerful sales weapon but many salespeople fail to take advantage of it.
Sales referrals are the most important prospecting approaches utilized by the salespeople to create new leads.
Sales referrals are generated when the existing client gives the name and communication information of the prospect to his sales agent.
Performing a referral plan will help you optimize sales because it generating good prospects that will expand business funnel heading to a larger Return on Investment than cold calling, Publicity events or Discount offers.