Final answer:
During the time when the Christian Greek scriptures were written, the authors themselves as well as those who witnessed the life and teachings of Jesus were still alive. Their firsthand accounts and experiences would help verify the truthfulness of the scriptures.
Step-by-step explanation:
During the time when the Christian Greek scriptures were written, some people who were still alive included the authors of the texts themselves, such as the apostle Paul. Other individuals who were alive during this time period and could have testified to the truthfulness of the scriptures were those who witnessed the life and teachings of Jesus, such as his disciples. This would help verify the truthfulness of the scriptures because these individuals could provide firsthand accounts and experiences. Their testimonies would carry weight and credibility, especially if they were able to confirm the events and teachings described in the scriptures. Therefore, some individuals who were alive when the Christian Greek scriptures were written include the authors themselves, such as Paul, and those who witnessed the life of Jesus, including his disciples.