The given data shows the registration of bikes and total vehicles (in thousands) for 6 months in 2017 in City X. Note: In the chart, the first number represents bikes and the second number represents total vehicles. Based on the given data, from January to April 2017, the increase in the registration of vehicles other than bikes is ________ .

Options

A. 8000
B. 9050
C. 8500
D. 9000