William's crime is larceny.
There are different types of thefts, including robberies, larcenies, and burglaries. Robbery is when you steal someone's belongings using threats, without their consent, but with their knowledge. On the other hand, larceny occurs when you steal someone's belongings without them knowing, which is the case here with William and him stealing 5 saddles furtively.
Advantages: moderate buying and selling
disadvantages: less 'freedom' for the buyer and sellers
The answer is: [B]: "human nature" .
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