The percentage of global tourists who visit Glastock has increased by five percentage points over the past three years. Since tourism contributes an estimated 7% of Glastock's gross domestic product, this increase is likely to have a positive impact on the economy of Glastock.
Which of the following, if true, most strengthens the argument given?
【选项】
The number of people who travel internationally for pleasure has increased slightly over the past three years.
选项是否正确？