What are malignant tumors

Any tumor which does not progress.

Explanation:

A malignant tumor, by Latin definition, means "not mean". It is an abscess of mutated cells which does not continue to grow throughout the body, corrupting more surrounding cells and further harming the body. In some cases, they do not need to be removed, as they are not dangerous to other cells or organs.

answer; i do believe that the correct answer is (b)

i believe the answer would be 1975.

hope this