Final answer:
The e-commerce conversion rate for two visits where Person A makes two purchases and Person B makes none is 100%.
Step-by-step explanation:
The e-commerce conversion rate is calculated by dividing the number of purchases by the number of visits, and then multiplying the result by 100 to get a percentage. In this scenario, Person A makes two purchases in one visit, and Person B makes zero purchases in one visit, resulting in a total of two purchases over two visits. Therefore, the e-commerce conversion rate is calculated as (2 purchases / 2 visits) × 100, which equals 100%. So, the correct answer to what the e-commerce conversion rate is for these two visits is b) 100%.