A) Enabling customer service agents to enroll customers in an Abandoned Cart Journey in Marketing Cloud if an interaction does not result in the processing of an order can help increase checkouts and decrease the time from adding items to completing a checkout by sending targeted and personalized messages to customers who have left items in their carts without purchasing them. This can help re-engage customers, remind them of their cart contents, and encourage them to complete their orders. D. Monitoring the cart items and time since it has been active in B2C Commerce and sending a reminder and checkout incentive 18 hours after the cart was last modified can help increase checkouts and decrease the time from adding items to completing a checkout by leveraging customer behavior data, timing, and urgency to motivate customers to buy their items before they are out of stock or unavailable. This can help reduce cart abandonment, increase conversion rates, and boost customer loyalty. Reference:

https://help.salesforce.com/s/articleView?id=sf.mc_jb_abandoned_cart.htm&type=5

https://help.salesforce.com/s/articleView?id=sf.b2c_commerce_abandoned_carts.htm&type=5