Option A: On the average A earned more than B during this period.
To determine the average earnings of A and B from 2000 to 2010, one must analyze the graph's data points for each year. If the graph consistently shows A's earnings above B's for most of the years, it indicates that A's average earnings are higher. Conversely, if B's earnings surpass A's in fewer years, it supports the conclusion that A earned more on average. Without the actual graph, the provided answer suggests that A's earnings were generally higher than B's throughout the specified period.