Educators emphasise that students' school success can be effectively promoted ----.
A) even if they are encouraged to discover their own errors and correct themselves
B) because introducing students to abstract concepts might be a painstaking process for teachers
C) although teachers strive to spark students' imagination and improve their problem-solving skills
D) when they are guided to collaborate with their peers to complete classroom tasks
E) given that self-reliance and perseverance are among the students' highly-valued assets