Which statement correctly explains the aspect “Word order after innamā” in the example “إِنَّمَا زَيْدٌ كَاتِبٌ”?

Qasr by Coordination, Negation–Exception, and Innamā

• Coordination and qasr al-ifrād — Zayd is a poet, not a writer.
• Word order after innamā — Zayd is only a writer.
• Alternatives in coordination — Zayd is a poet, not a writer.
• Restrictive force of innamā — The believers are but brothers.