Which of the following best defines microbial colonization in the context of infectious disease?

The establishment and persistence of a microorganism on or within a susceptible host where it can survive and potentially multiply.

The transient carriage of microbes on skin or mucosa without any replication or interaction with host tissues, which disappears within minutes after contact.

The process by which a pathogen reproduces exclusively outside a host in the environment and later contaminates fomites but never makes direct contact with host tissues.

The process where a microbe passes briefly through the gastrointestinal tract without binding or growing but causes systemic immune activation solely due to antigen exposure from dead organisms present in food or water.