Final answer:
The correct answer is option c) 1970, which marks the establishment of the first Ta'lim curriculum by the IIS, as part of their commitment to promote understanding and scholarship of Muslim cultures.
Step-by-step explanation:
The first Ta'lim curriculum established by the Institute of Ismaili Studies (IIS) was in 1970, making option c) 1970 the correct answer. The IIS was created to promote scholarship and learning of Muslim cultures and societies, to encourage a better understanding of their relationships with other societies and faiths. By doing so, the IIS aims to foster a greater understanding among the Ismaili community and its rich history and diverse expressions. The Ta'lim curriculum, in particular, is part of this educational effort, designed to offer curricula and learning materials related to Islamic studies for various age groups within the community.