Incorrect Roman Numeral: LVV

Explanation:
Roman numerals use a combination of letters to represent numbers. Each letter represents a different value, and the numbers are written by adding or subtracting these values. The basic Roman numeral symbols are:

- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000

In the Roman numeral system, letters are combined to create numbers. The letters are usually written in order from largest to smallest, with the largest letters on the left. When a smaller letter is placed before a larger letter, the smaller letter is subtracted from the larger letter. When a smaller letter is placed after a larger letter, the smaller letter is added to the larger letter.

In the given options, the Roman numeral 'LVV' is not written correctly according to the Roman numerals rules. There are two reasons why 'LVV' is incorrect:

1. The letter 'V' can only appear a maximum of three times in a row. In Roman numerals, the number 5 is represented by the letter 'V', so 'VVV' would represent the number 15, not 5.

2. When a smaller letter appears before a larger letter, it is subtracted from the larger letter. However, there is no letter in Roman numerals that represents the number 55, so 'LVV' cannot be a valid Roman numeral.

Therefore, option 'D' is the correct answer as it is not written correctly according to the Roman numerals rules.