What reason can be given for Sam moving house?

The reasoning behind the answer is that Sam's discontent with commuting suggests a specific motivation related to a dissatisfaction he experienced with his current living situation. This implies that the hassle or inconvenience associated with commuting was significant enough to influence his decision to move house, showcasing a practical consideration for improving his quality of life.

In contrast, while the other options present valid reasons for moving, they do not specifically point to a personal issue Sam faced that would lead to a decision. For example, wanting a change (the second choice) implies a more general desire for novelty rather than a reaction to a specific problem like commuting. The preference for the city (the third choice) speaks to a broader lifestyle choice that might not have been directly linked to Sam's current dissatisfaction. Lastly, relying on friends’ advice (the fourth choice) suggests that outside influence played a role, which potentially downplays Sam’s autonomy in making this decision. Therefore, the primary motivation of discontent with commuting provides a clearer and more personal rationale for his move, making it the best choice in this scenario.