Simplify the following text for a Grade 10 native English-speaking person.
Original: By the late 20th century yoghurt had become a common American food item and Colombo Yogurt was sold in 1993 to General Mills , which discontinued the brand in 2010 .
Simplified: By the late 20th century yoghurt had become a common food in America and Colombo Yogurt was sold in 1993 to General Mills , who stopped using the brand name in 2010 .