Based on the comparison of the box plots summarizing the cost of repairs at a car shop, the best statement to choose is:
Cars without insurance were more likely to have a higher repair cost.
This statement highlights a key aspect of distributions usually represented in box plots, where you can compare the spread and positioning of the data between the two groups (with and without insurance). The other statements are either too absolute (like saying "always" or stating a mean value without proper context) or may not be supported by the actual data shown in the box plots.