Three of the Following Conditions Are Likely to Affect the Reliability

Three of the following conditions are likely to affect the reliability of classroom assessment instruments. Which condition is likely to have little or no effect on reliability?

A) Whether the teacher responds consistently to various students' questions about the assessment tasks
B) Whether the teacher gives the same or different instructions to different students
C) Whether students have learned what they were supposed to learn
D) Whether students are distracted by noise outside the classroom windows