Hardware and software failure - such as power loss or data corruption.
C: a different atomic mass
Answer:
G7 (option B)
Explanation:
Cell references are written as: Letter | number
(column | row)
For example: If a cell was in the first column, [column a], and the tenth row [10], the cell would be named "A10"
The seventh letter in the alphabet is G, and we know that the 7th row is the number 7. So, the cell has the reference of "G7"