Answer :
Answer:Social influence.
Explanation:Social influence are influences of reference group,family and culture which influences a customer's decision in buying.
In many cases,a reference group endorses a product before a consumer buys the product.
Family influence also has a large impact on the customer's decision.If the product has been bought by the consumer's family,the family gives her good or bad feed back on the product,this will go a long way in the purchase decision.
The culture of the consumer is also a social determining factor.if a product is unacceptable In the consumer's culture,such product will not be purchased by the consumer.
All theses are social influences that determines a consumer's buying decision.