When doing curls, John is careful to extend through the full range of motion and quickly lock his elbows to make sure that he does not drop the weight. This is an example of . A. a good technique because he moves quickly B. a bad technique because he moves through the range of motion C. a good technique because he is paying attention to form D. a bad technique because he quickly locks a joint Please select the best answer from the choices provided. A B C D