Final answer:
Women aged 51-65 are the most likely to be in church regularly, consistent with trends showing higher religious service attendance among older adults.
Step-by-step explanation:
The question is asking which age group of women are most likely to attend church regularly. Based on social trends and available data, such as the provided Pew Research Center's survey, attendance at religious services tends to increase with age.
Older individuals, particularly those who are 65 and older, are generally more likely to be involved in religious services on a regular basis when compared to younger age groups. For the purpose of this question, option D. 51-65 would be the most likely age group of women to attend church regularly. This is supported by general trends that indicate higher levels of participation in religious activities among older adults.