已知数列{a_n}中，a₀=2，a₁=3，a₂=6，且对n≥3时，有a_n=（n+4）a_n-1-4na_n-2+（4n-8）a_n-3．

（Ⅰ）设数列{b_n}满足b_n=a_n-na_n-1，n∈N^*，证明数列{b_n+1-2b_n}为等比数列，并求数列{b_n}的通项公式；

（Ⅱ）记n×（n-1）×…×2×1=n!，求数列{na_n}的前n项和S_n．

The Internet is a wonderful discovery, ___of great significance to people’s lives.

A．as is I think.

B．which think it is

C．which I think is

D．as I think