What Is the Correct Order of Reagents to Achieve the Following

What is the correct order of reagents to achieve the following synthesis?

A) 1) KNH₂/NH₃ 2) Butyl chloride 3) Propyl iodide 4) OH^-, H₂O 5) H₃O⁺ 6) heat
B) 1) NaOEt/EtOH 2) Butyl chloride 3) Potassium tert-butoxide 4) Propyl iodide
5) OH^-, H₂O 6) H₃O+
C) 1) NaOEt/EtOH 2) Butyl chloride 3) NaOEt/EtOH 4) Propyl iodide 5) OH^-, H₂O 6) H₃O⁺
D) 1) NaOEt/EtOH 2) Potassium tert-butoxide 3) Butyl chloride 4) Propyl iodide
5) OH^-, H₂O 6) H₃O⁺