The major points of the lesson were quickly learnt by the class,but they were also quickly forgotten by them.

• A. he class quickly learnt but forgot the major points of the lesson.
• B. he class quickly learnt the major points of the lesson but they also forgot them.
• C. he class learnt and forgot the major points of the lesson quickly.
• D. he class quickly learnt the major points of the lesson but also forgot them quickly.