How do cancer cells spread through the body?
a. malignant tumors can invade nearby parts of the body.
b. the malignant cancer may also spread to more distant parts of the body through the lymphatic system or bloodstream.
c. this process is usually very difficult to treat and is a phase of cancer development called:

the correct option is B.

Explanation:. Cancer cells ( also called tumor) grow and divide at an abnormally rapid rate, they are poorly differentiated, and have abnormal membranes, cytoskeletal proteins, and morphology. The abnormality in cells can be progressive with a slow transition from normal cells to benign tumors to malignant tumors. The malignant cancer may also spread to more distant parts of the body through the lymphatic system or bloodstream.

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.