Which of the Followings Statements Is False Concerning School Buildings

Which of the followings statements is false concerning school buildings?

A) One study found a 5- to 17-point difference in standardized test scores for students who attended school in well-maintained buildings compared with students who attended school in poorly maintained facilities.
B) One study found that if a school district were to improve its schools' condition from poor to excellent, student test scores would increase by an average of 10.9 percentile points.
C) Working in "sick buildings" creates health issues for students and staff resulting in higher absentee rates and lower teachers' capacity to effectively instruct students.
D) 98.9% of school buildings are in excellent shape and maintained well.