How can sales representatives increase their earnings?

Sales representatives can significantly increase their earnings by focusing on selling catalog items, as well as adding and renewing services. This approach not only diversifies the products and services they offer but also enhances the overall value provided to customers. Catalog items often represent a substantial portion of sales, and by successfully upselling additional services, representatives can capture more revenue from each customer account. Renewals are critical as they provide a steady stream of income, ensuring continuous engagement with clients. This combination of selling, adding, and renewing services leads to greater customer satisfaction and loyalty, ultimately contributing to higher commissions and earnings for the representative.

In contrast, reducing the number of catalog sales or limiting services would restrict potential income, while offering only renewal discounts does not bring new revenue streams into play. Thus, option C represents a comprehensive sales strategy that leverages various revenue opportunities.