Final answer:
The period of 1750-1800 was not ideal for calling for freedom due to limited awareness of enlightenment ideas and other obstacles such as low literacy levels and scarcity of printed materials.
Step-by-step explanation:
The period of 1750-1800 was not an opportune moment for others to call for their freedom primarily due to d) Limited awareness of enlightenment ideas. During this time, there was a lack of widespread knowledge and understanding of the Enlightenment ideals, such as popular sovereignty and natural rights, which were the main justifications for the American Revolution.
Many colonists remained loyal to England and hoped for reconciliation, while others sought different goals, such as economic freedoms or resisting westward expansion. Additionally, there were also other obstacles that made it difficult for those at the lower end of the socioeconomic ladder to actively participate in the print culture of the Enlightenment. These obstacles included b) low levels of literacy and a lack of leisure time and c) a widespread shortage of books and other printed materials.