Utilize the input text as a context reference, choose the right relationship between 'Dixons' and 'retail' from the options.
Options: chairperson, brand, chief executive officer, industry

Dixons Carphone (LSE: DC.L - news ) is venturing stateside by teaming up with US network Sprint to open 20 retail stores, in the first stage of a partnership that could extend to 500 sites.
industry