求教一道逻辑题～

姜欧恩

During excavations for a highway, workers just uncovered a hoard of over 30,000 eighteenth-century gold coins. These coins, most in superb condition, are of a type that has long been quite rare and correspondingly highly valued. Several coins of the same date and type recently sold at auction for over $5,000 each, despite being in poor condition. Clearly, therefore, in today’s market, this hoard, if sold, is bound to bring in at least $150,000,000

Which of the following is an assumption on which the argument depends?

(A)  The workers who uncovered the coins did not take for themselves a significant number of coins before reporting their find.

(B)  The hoard of coins would not bring in more if broken down into small parcels to be sold individually than if sold as a single quantity.

(C) The appearance on the market of thousands of additional coins of this type will not significantly affect the status of these coins as rarities.

(D)  It is not possible to determine whether the hoard of coins was buried by people who were then its legal owners.

(E)  Whoever might sell the coins would be sufficiently knowledgeable about such sales to secure the highest possible price for the coins.

答案是c，为什么d不可以呢，取非以后“(D)  It is  possible to determine whether the hoard of coins was buried by people who were then its legal owners.”
既然是别人的东西不就不能在市场上转手吗


希望有大牛可以解答一下

断了的弦

想多了，人家说的钱，不要从可能性上入手