The Choice router evaluates its conditional routes sequentially from top to bottom. It executes the block of components corresponding to the first condition that evaluates to true. Once a matching route is found and executed, the Choice router's execution completes, and it does not evaluate any subsequent conditions. Since the question states all three conditions are true, the router will evaluate the first condition, find it true, execute the "Route1" Logger, and then exit, ignoring the other routes.

B. Route2: This would only be logged if the first condition were false and the second were true. The Choice router stops after the first true condition.

C. Route1,Route2: This is incorrect because the Choice router executes only one path, not multiple paths, based on the first successful evaluation.

D. Route1,Route2,Default: The default route is only executed if none of the preceding conditions evaluate to true.

- MuleSoft Documentation, "Choice Router". The documentation explicitly states: "The Choice router...routes messages through a flow...The first expression that evaluates to true triggers that route’s execution." (Document ID: choice-router)

- MuleSoft Documentation, "Control Flow Scopes". This section describes the fundamental "first-match" logic of the Choice router in contrast to other routers like Scatter-Gather. (Document ID: control-flow-scopes)