Final answer:
The term for the practice of a king selling positions with the church to friends is Simony. It refers to the act of selling church offices and positions which is regarded as a misconduct.
Therefore, option B is correct.
Step-by-step explanation:
The term for the practice of a king selling positions in the church to friends is B) Simony.
Simony, named after Simon Magus who appears in the New Testament, is a term used to define the act of selling church offices and positions, which was considered a grave misconduct. Over centuries, despite being a punishable offense, it became fairly widespread, with kings and nobles often granting ecclesial positions to their kinsmen or allies, essentially transforming these spiritual offices into sources of income or political influence.
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