After Reading the Paragraph Below, Answer the Questions That Follow

After reading the paragraph below, answer the questions that follow.
Offering nutritious lunches in public schools is a popular health topic. School lunches have had to meet new nutrition standards since the fall of 2012. In 2013, the USDA (United States Department of Agriculture) reviewed data from the 2005 School Nutrition and Dietary Assessment to investigate whether students in schools that were already following the new standards (school group A) and that therefore offered more fruits and vegetables than other schools (school group B) actually ate more of them.
-Finding #3: Of all of the schools surveyed in 2005: 75% offered lunches that met new weekly standards for amounts of dark, green leafy vegetables
85% offered lunches that met new weekly standards for amounts for red/orange vegetables
21% offered lunches that met new weekly standards for legumes
97% offered lunches that met new weekly standards for amounts for "other" vegetables
This suggests that

A) a majority of schools are offering adequate servings of grains.
B) only 15% of schools need to serve more green vegetables.
C) a majority of schools need to serve more legumes in their lunches.
D) about 25% of schools need to serve more citrus fruits.