What comfort measures were available to prisoners early in concentration camp history?

In early German (Nazi) concentration camps, several comforts were available to prisoners, including: the playing of music during labor, a food-based reward system, relatively comfortable sleeping conditions, and the ability - in some rare cases - to receive visitors.  However, despite these comforts, the conditions in early concentration camps were still inhumane, dirty, and unsafe.  

The answer to your question would be b

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