Final answer:
A. In order to reach his or her destination, the traveler must leave the comfort zone behind.
The correct inference about 'the traveler' is that to reach their destination, they must leave their comfort zone, depicted by the metaphorical journey of knocking on every alien door and wandering through outer worlds to discover the innermost shrine.
Step-by-step explanation:
The passage suggests that the traveler must undergo a journey that involves challenges and encounters with the unfamiliar to reach a deeper, personal destination. They experience the outer world, e.g., knocking at every alien door and wandering through outer worlds, which are metaphors for stepping out of one's comfort zone and undergoing personal growth. Therefore, the innermost shrine suggests a metaphorical place of self-discovery or ultimate understanding that one reaches at the journey's end.
Based on this interpretation, the correct inference about the traveler is option (A): In order to reach his or her destination, the traveler must leave the comfort zone behind. This option encapsulates the essence of the passage, where undertaking a difficult and often uncomfortable journey results in reaching a significant and personal goal - the innermost understanding or true self.