Coca-Cola has agreed to review its top sugar suppliers to ensure that the company does not buy from large plantations that were assembled using “land-grab” tactics that evict small farmers or local residents, the company announced this week. The soft drink company is taking the action on the urging of human rights group Oxfam. As part of a series of commitments announced on its Web site Thursday night, Coke also disclosed the names of its top individual sugar suppliers for the first time — Brazil’s Copersucar, Thailand’s Mitr Phol and Nigeria’s Dangote — and identified Brazil, Mexico and India as its top three national sources of the sweetener...