Which interpretation best fits “مَا جَاءَ إِلَّا زَيْدٌ” in context?

Qasr by Coordination, Negation–Exception, and Innamā

• Scope in the verse about prohibition — He prohibited carrion to you (within the context of the statement).
• Coordination versus innamā — Zayd is a poet, not a writer / Zayd is only a poet.
• The coordinating method — Zayd is a poet, not a writer.
• Restricting the agent — Only Zayd came.