Considering the historical context of the early church, what was the main theological concern addressed in the book of 1 Peter regarding the believers' suffering?

A To encourage believers to seek revenge against their persecutors. B To explain suffering as a direct consequence of individual sins. C To call believers to maintain their testimony and holiness amidst persecution, understanding it as a participation in Christ's sufferings and a pathway to future glory. D To suggest that suffering was avoidable through strict adherence to Jewish law.