the process of invasion by malignant cells is dependent on a. activation of TNM system b. release of enzymes by invading cells c. decreasing anaplasia d. tissue damage by chemotherapy e. stromal adhesion Solution The malignant cells usually adhere and degrade the healthy tissues.After adhering they produce certain proteases which help in degrading the membranes of the cells. It is a complicated process of many factors running with it Option b would suit.