What is the crossing out or overwriting original material to make it unreadable? erasure obliteration digitizing all of the above?

Answer;

-Obliteration

-Obliteration is the crossing out or overwriting of original material to make it unreadable

Explanation;

-To obliterate means to remove or destroy all traces of; do away with; destroy completely. to blot out or render undecipherable (writing, marks, etc.); efface.

-Erasure is the removal of handwriting, typescript, or another feature of a document using chemicals, abrasive surfaces, etc.

-Digitizing happens when a document image is stored in digital memory.

B. Obliteration

Explanation:

the supermassive black hole is in the middle of the galaxy.

i believe the answer would be b. hope it : )