Which retail innovation significantly expanded access to religious texts and materials in traditionally underserved religious communities during the 1960s-1980s?

Religious bookstores and supply shops have undergone significant transformation over the centuries. From medieval manuscript dealers to modern spiritual marketplaces, the business of faith-based retail has adapted to changing technologies and consumer needs. This trivia question explores an important retail strategy shift that revolutionized accessibility to religious texts and materials in the 20th century.

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The introduction of religious mail-order catalogs allowing customers in remote areas to purchase materials without physical stores
The creation of exclusive membership-only religious bookstores that required church affiliation to enter
The development of religious retail chains that only operated inside established houses of worship
The launch of subscription-based religious text services that delivered only to clergy members