Read the following context and choose the best option to answer the question.
Context: It soon became apparent that there was nothing mystical about the vanishing of Donna Noble . Down on the coast was a small dock , barely noticeable from the cliff top where we had previously stood . In a bid to make a quick buck , and raise themselves from the poverty they were forced to inhabit ; a few local people had set up a Ferry business , taking holiday makers over to the next island for ridiculously high prices . The reason why Donna 's DNA trail vanished , was because the ocean had taken away any trace of her .
Question: What might have happened before this disappearance ?
Options: 
A. The police investigated Donna Noble 's disappearance and concluded that she had mystically vanished .
B. None of the above choices .
C. The police investigated Donna Noble 's disappearance and concluded that she had taken a ferry .
D. Someone reported Donna Noble 's disappearance and then her body was found at the cliff top .


C