The least common multiple of the first 800 positive integers is n
So, n is a multiple of 1, a multiple of 2, a multiple of 3, a multiple of 4, . . . a multiple of 9, . . . ., a multiple of 89, . . . a multiple of 799, and a multiple of 800

What is the least common multiple of the first 801 positive integers in terms of n ?
801 = (9)(89)
In other words, 801 is a multiple of 9, and 801 is a multiple of 89
Since n is already a multiple of 9 and a multiple of 89, we know that n must be a multiple of 801

So, if n is the least common multiple of the first 800 positive integers, n is also the least common multiple of the first 801 positive integers.

Answer: A