Answer:
C. 5
Step-by-step explanation:
For n = 3, 2n > 8 is false because 6 > 8 is not true.
For n = 4, 2n > 8 is false because 8 > 8 is not true.
For n = 5, 2n > 8 is true because 10 > 8 is true.
For n = -10, 2n > 8 is false because -20 > 8 is not true.
The answer is C. 5.