To answer this question, it would be helpful to look at the factors of each of the listed numbers. Start with 14. Its factors are 1, 2, 7 and 14. 4 isn't one of its factors, therefore, it can't be a multiple of 4. Then, the factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24, so it is a common multiple of 2 and 4. Then comes 26, whose factors are 1, 2, 13 and 26. So it can't be a multiple of 2 and 4. Then, lastly, the factors of 34 are 1, 2, 17 and 34. So it isn't a multiple of 2 and 4 either. Out of the four options, only 24 is a multiple of both 2 and 4.