The correct option about a State Machine layout is that it can have only one initial state and multiple final states. A State Machine is a type of workflow that consists of a set of states, transitions, and triggers. A state represents a stage of the process, a transition represents a change from one state to another, and a trigger represents a condition or an event that activates a transition. A State Machine can have only one initial state, which is the starting point of the workflow, and one or more final states, which are the end points of the workflow. A State Machine can also have intermediate states, which are the states between the initial and the final states. A State Machine can have multiple paths and branches, depending on the logic and the triggers of the workflow.