Archaeologists have recently found in various grave sites in the mexican state of veracruz , small ceramic animals with attached wheels . At first this find might seem to discredit the belief that the wheel and its uses were unknown in pre-columbian culture .On reflection ,however, it would seem that discovery actually bears out this belief . To be familiar with these toys and yet not to apply the principle of the wheel to daily tasks such as carting,trasportation and pottery-making must indicate a lack of understanding of the wheel and potential benefits.
Which of the following best expresses the argument made in the passage above?
A. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would not have attached wheels to ceramic animals.
B. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would not have adapted it to everyday use
C. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would not have adapted the idea of the wheel from the wheeled ceramic figures
D. Pre-Columbian people of Veracruz, must have known of the wheel and its use because they attached wheels to ceramic animals.
E.Since the pre-Columbian people of Veracruz did not know of the wheel or its uses, the ceramic animals found in the grave sites must be the remains of later cultures.

[spoiler]OA: C
Can someone explain D[/spoiler]