Answer:
2. Word of mouth promotion
Step-by-step explanation:
Word of mouth is a form of advertisement or promotion in which satisfied customers go around telling other people how much they like your products or services. It is an unpaid form of marketing that is triggered by positive customer's experiences. Here, Ms McNick classes is enjoying from word of mouth form of promotion, because satisfied students have gone around saying she's the best teacher on campus. It is one of the easiest ways to spread a business. It is dependent on product/service quality and customer's satisfaction.