Which pairing correctly matches expansion diffusion and relocation diffusion?

• A. Expansion: diffusion of the smartphone; Relocation: diffusion of a cuisine by migrants
• B. Expansion: diffusion of a cuisine by migrants; Relocation: diffusion of the smartphone
• C. Expansion: diffusion of fashion; Relocation: diffusion of language
• D. Expansion: diffusion of calendars; Relocation: diffusion of music

Answer: (B)