What happens to personal information stored digitally if it is accidentally deleted?
O A. It can always be recovered.
B. It becomes a computer virus.
C. It is backed up as analog storage.
O D. If the data is overwritten, it is gone.

b. to discover aspects of the natural world.

hopefully i .

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.