To round up implies to make a number simpler but keeping its value close to what it was.
There are two(2) major rules for rounding, which are:
For this case of 412.802, the number that is followed after the decimal point is 8, therefore we would round up the number before it which is 2.
Thus, 412.802 to the nearest whole number is 413.
Hence, the correct option is option D