Please check my answer thanks :)
What is a good rule to follow for training a dog in agility jumps?
A. Start with low jumps and gradually increase the height to the proper level.
B. Begin by conditioning the dog when it's approximately 18 months old.
C. Start by having the dog approach the jump at an angle of about 180 degrees.
D. Don't begin to train for jumps until the dog has mastered the contact obstacles.
My answer is A tho I think conditioning the dog is important as well