I believe the answer is B.RUW
According to many experts, including myself when it comes to backing up important files and media, it is good to backup every once every 2 weeks or once every week just to keep things safe.
Answer: relative references
Explanation: By default, all cell references are relative references. When copied across multiple cells, they change based on the relative position of rows and columns. For example, if you copy the formula =A1+B1 from row 1 to row 2, the formula will become =A2+B2.13 may. 2020
data declaration means a variable which contain data value and it can be declared as integer, float, character, double, boolean (data types).
example:
int r;
char name;
float g;
double k= 23.34;