Final answer:
The correct answer is option c. The particularly problematic aspect of "First-Day Thoughts" from a Biblical standpoint is the absence of any reference to God or religious content, as the Sabbath is traditionally a day dedicated to rest and worship according to Biblical teachings.
Step-by-step explanation:
From a Biblical standpoint, the aspect of "First-Day Thoughts" that may be considered particularly problematic is C) The absence of any reference to God or religious content. In the Bible, the Sabbath day, traditionally observed from Friday evening to Saturday evening, is regarded as a day of rest and worship. The Fourth Commandment states, "Remember the Sabbath day, to keep it holy" (Exodus 20:8), which implies that the day is dedicated to God. By not including any reference to God or religious observance, "First-Day Thoughts" overlooks the central element of the Sabbath for those who observe these Biblical teachings.
Even though the Christian tradition later came to view Sunday as the Lord's Day, marking Jesus' resurrection, the absence of any religious mention would still be seen as problematic by many Christians who view the day as set apart for spiritual reflection and communion with God.