Answer:
D: (-2)+(-1)+0+1+2+3 ; 3
Step-by-step explanation:
[tex]\[ \sum_{n=1}^{6} (n-3) \\=(1-3)+(2-3)+(3-3)+(4-3)+(5-3)+(6-3)\\=(-2)+(-1)+0+1+2+3\\=3[/tex]
Therefore, the correct answer is D.
