Which statement correctly explains the aspect “Restricting the agent” in the example “مَا جَاءَ إِلَّا زَيْدٌ”?

Qasr by Coordination, Negation–Exception, and Innamā

• Scope in the verse about prohibition — He prohibited carrion to you (within the context of the statement).
• Selecting a restriction device — Coordination, negation–exception, and innamā.
• Coordination and determination — Zayd is a poet, not a writer.
• Restricting the agent — Only Zayd came.