Can guest customers place orders?

Guest customers can indeed place orders in Magento, but this ability depends on the configuration settings for 'Guest Checkout'. By default, Magento allows guest checkout, which means that customers can place orders without having to create an account. This feature is particularly useful for customers who wish to make a quick purchase without the commitment of registering for an account.

However, the functionality can be toggled on or off in the configuration settings. If the 'Guest Checkout' option is disabled, then guest customers will not be able to place orders, and they will be required to create an account before proceeding with a purchase. Therefore, the ability for guest customers to place orders is contingent upon the store's specific settings related to guest checkout.

In contrast, while the other statements make assertions about guest customer capabilities, they do not accurately capture the conditional nature of guest checkout functionality within Magento. Only option C reflects the reality that this capability is determined by the store's configuration.