$16,800 is the collector s value of ______.……

Any mistake made in the printing of a stamp raises its value to stamp collectors. A mistake on one inexpensive postage stamp has made the stamp worth a million and a half times its original value.
The mistake was made more than a hundred years ago in British colony of Mauritius, a small island in the Indian Ocean. In 1847, an order for stamps was sent to London printers, Mauritius was to become the fourth country in the world to issue stamps.
Before the order was filled and delivered, a ball was planned at Mauritius Government House, and stamps were needed to send out the invitations. A local printer was instructed to copy the design for the stamps. He accidently wrote down the words "Post Office" instead of "Post Paid" on the several hundred stamps that he printed.
Today there are only twenty-six of these misprinted stamps left—fourteen One Penny Orange-Reds and twelve Twopenny Blues. Because of the Twopenny Blues" rareness and age, collectors have paid as much as $16,800 for it.$16,800 is the collector"s value of ______.

A．the One Penny Orange-Red
B．the Twopenny Blue
C．any stamp printed in 1847
D．both A and B