Mathematical expressions
We know that we can have
0, 1, 2,... pencils
This mean that we cannot have a negative number of pencils (that would not have sense)
Then choice C and D are discarded
Since we can have 8 or less and we could have 0 pencils then the options are
0, 1, 2, 3, 4, 5, 6, 7 or 8
Answer: A