Explanation

The highest common common factor (HCF) of 2, 6, and 9 is 1, because 1 is the greatest integer that divides all three numbers exactly without leaving a remainder.

The least common multiple (LCM) of 2, 6, and 9 is 18, because 18 is the smallest number that is a multiple of all three numbers.

The correct answer is: HCF = 1 and LCM = 18.