input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Stress breakers are not used in partial denture construction because:   (A) They are expensive   (B) Increase the vertical dimension   (C) They are difficult to design and fabricate   (D) Harmful effect on the abutment
output: ['(C) They are difficult to design and fabricate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) They are expensive  (B) Increase the vertical dimension  (C) They are difficult to design and fabricate  (D) Harmful effect on the abutment <> possible answers', '  Stress breakers are not used in partial denture construction because: <> context']