Which answer would score higher? Not sure where to start? Explain this Answer A Cell changes cause uncontrolled division, forming a malignant tumour. Its cells stay contained inside a membrane, enter the blood and spread to another part of the body, where they divide to form a secondary tumour. Answer B Cell changes cause uncontrolled division, forming a malignant tumour. Its cells invade neighbouring tissue, enter the blood and spread to another part of the body, where they divide to form a secondary tumour.