Roland writes a story in which boaters become stranded on a sandy island. In the story, they set about collecting materials to create semiconductors to repair computer components in their radio.
Which problem is likely to be the most difficult for Roland's characters to overcome?
A) There are no semiconductor elements on the island.
B) Any substances they find are too impure.
C) They lack materials to make a p-type semiconductor.
D) No conductors are available to connect the components.
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