Pope Gregory VII excommunicated Henry IV after he refused to stop: D. installing his own bishops.
<h3>What is
excommunication?</h3>
Excommunication can be defined as an act which involves officially excluding or refusing a person (individual) from participation in the sacraments, communion, and other services associated with the Christian Church, especially Roman Catholic Church.
As king, Henry IV believes that he had an absolute right and power to appoint (install) the bishops of the German church and this idea was known as lay investiture. However, Pope Gregory angrily opposed this idea because he wanted all of the power for himself and as such he excommunicated Henry IV.
In this context, we can infer and logically deduce that Pope Gregory VII excommunicated Henry IV after he refused to stop installing his own bishops.
Read more on excommunication here: brainly.com/question/19231515
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