Final answer:
The primary focus of Sufism in English literature is Mysticism, which emphasizes spiritual inward contemplation and a connection with the divine.
Step-by-step explanation:
The primary focus of Sufism in English literature is C) Mysticism. Sufism, which is a mystical form of Islam, emphasizes inner personal contemplation and a deep connection with the divine. While it became increasingly integrated into everyday religious life, its influence extended to various areas, including the arts and literature. In English literature, Sufism's mystical aspects resonate with the themes of romanticism—yet Sufism remains distinct in its spiritual focus and profound inward journey, setting it apart from other literary movements that may feature mysticism as a theme.