The correct answer is C. 8.
The For loop will iterate 1 time, because 5 is greater than or equal to 5 and 9 is less than or equal to 9. The value of count will be 5 when the loop starts. The MessageBox.Show("Hi") statement will be executed once. The value of count will be 10 after the first iteration of the loop. However, the Step statement specifies that the value of count should be incremented by 5 each time the loop iterates. Therefore, the value of count will be 15 after the second iteration of the loop, which is greater than 9. The loop will therefore terminate after the second iteration. The value of count will be 8 when the loop ends.
Option A is incorrect because the value of count is 8 when the loop ends, not 10.
Option B is incorrect because the value of count is 8 when the loop ends, not 9.
Option D is incorrect because the value of count is 8 when the loop ends, not 7.