For me it's B : Tracking Net Promoter Scores (NPS) as part of an automated survey after case closure for every case is a KPI that can help explain the disparity between customer satisfaction and CSAT. NPS is a metric that measures how likely customers are to recommend a company or product to others, based on a scale from 0 to 10. NPS can help capture the overall loyalty and satisfaction of customers, as well as their feedback and testimonials. NPS can be integrated with Salesforce using third-party apps or custom solutions. Verified References: : https://help.salesforce.com/s/articleView? id=sf.nps_overview.htm&type=5 : https://help.salesforce.com/s/articleView?id=sf.nps_salesforce.htm &type=5

Option (c) Measure the difference in CSAT (Customer Satisfaction) scores for cases with and without articles attached.

By comparing the CSAT scores of cases with and without articles attached, we can determine if the availability of knowledge articles has a positive impact on customer satisfaction. If the CSAT scores are higher for cases with articles attached, it suggests that the knowledge management system is indeed contributing to positive support experiences and customer satisfaction. This KPI will help identify the effectiveness of the knowledge management implementation and its impact on customer satisfaction.