Professor Hasan total his class that the method of student evaluation of teachers is not a valid measure of teaching quality.Students should fill out questionnaires at the end of the semester when courses have been completed. Which of the following,if true, provides support for professor Hasan's proposal ?

Correct Answer: Professor Hasan received low ratings from the students.
In transfusions of packed red blood cells, individuals with type O Rh D negative blood are often called universal donors. Those with type AB Rh D positive blood are called universal recipients.