Final answer:
A salesperson should consider Option 1: A. account turnover when determining how often he or she should call on an account. If an account has a high turnover, it may be necessary for the salesperson to make more frequent calls in order to retain the customer or generate new business.
Step-by-step explanation:
A salesperson should consider account turnover when determining how often he or she should call on an account. Account turnover refers to the rate at which customers are gained or lost by an organization. If an account has a high turnover, it may be necessary for the salesperson to make more frequent calls in order to retain the customer or generate new business. On the other hand, if an account has a low turnover, the salesperson may not need to make as frequent calls.