Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that19/80Choose the option among A, B, C, D which needs correcting to make a complete sentence Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and fĩnd curesis helpingpreviouslysothatGiải thíchĐáp án là D. its => their