Figure 1 represents the export of rice by four regions in Country XX in the year 2009. One dot represents 20,000 tonnes of exported rice was used as the scale of the dot map. Study and use the dot map below to answer this question.
By how much tonnes was the export of rice from region T higher than that from region U?
20,000
40,000
60,000
80,000
Correct answer is D
No explanation has been provided for this answer.