The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Mgo added to alginate power to modify which property:   (A) Increases surface character.   (B) Increases shelf life.   (C) Increases shear and tear strength.   (D) Improve strength.
['(A) Increases surface character. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Increases surface character. \n (B) Increases shelf life. \n (C) Increases shear and tear strength. \n (D) Improve strength. <> possible answers', '  Mgo added to alginate power to modify which property: <> context@']