Affordable Auto offered to enter people into a drawing for a free car if they shared the company's advertisement on social media. This table gives the total number of times the advertisement was shared since the promotion began. The data can be modeled by a quadratic function. Length of promotion (days) 2 4 6 8 10 12
Number of shares 1200 3219 6240 10264 15290 21318

What function best models the data?

A. y=125.3x2+183.3

B. y=1.2x2+280

C. y=1.2x2+20.6x+280

D. y=125.3x2+257.8x+183.3