Final answer:
The major ways of measuring an e-commerce website's success include conversion rate, customer acquisition cost (CAC), and return on investment (ROI), but not bounce rate.
Step-by-step explanation:
All of the given statements about measuring an e-commerce website's success are true except for statement B. The bounce rate measures the percentage of visitors who leave the website after viewing only one page, rather than measuring the average time users spend on the website. The other statements, A, C, and D, are correct. Conversion rate measures the percentage of visitors who complete a desired goal, customer acquisition cost (CAC) measures the cost of acquiring a new customer, and return on investment (ROI) assesses the profitability of the e-commerce site.