The spread of a cancer from one site to others in the body is known as

The spread of a cancer from one site to others in
  the body is known as
  a. a benign tumor.
  b. metastasis.
  c. a malignant tumor.
  d. remission.
  e. both a benign tumor and a malignant tumor.

Question 2

Which of the following statements is false?
  a Checkpoint gene products that inhibit mitosis
  are called proto-oncogenes.
  b. Metastasis is the invasion of cancer cells into
  normal tissue.
  c. Malignant tumors differ from benign tumors
  in that their cells migrate.
  d. Cancer cells have lost the ability to stop
  dividing.
  e. The parent cell that started a cancer may have
  undergone a checkpoint gene mutation