"As competitors like Kroger, Publix, H-E-B, Jewel-Osco and others have invested in evolving customer lifestyle trends – by broadening organic and fresh offerings – and in improving customer service, the gap between both comp-store sales growth and customer satisfaction at Walmart U.S. grocery and supermarket competitors continues to widen," Hood writes.
What is the relationship between 'grocery' and 'Walmart' in the context of the input sentence.
Options: operator, director/manager, manufacturer, currency