Which prefix is associated with "after"?

The prefix associated with "after" is "post." This prefix comes from Latin and is used in various contexts to denote something that occurs later in time or after a specified event. For example, "postgraduate" refers to education that takes place after earning an undergraduate degree, and "postwar" describes the period that occurs after a war has ended. This clear connection between the prefix "post" and the concept of time following an event makes it the most appropriate choice in this context.

The other prefixes provided have distinct meanings that do not align with the notion of "after." For instance, "pro" usually signifies support or a forward position, "sub" indicates something beneath or under, and "infer" pertains to a conclusion drawn from evidence or reasoning rather than a temporal relationship. Hence, "post" stands out as the correct answer.