Your Answer is

Correct Answer is B

Explanation

The method of elimination.

Look at option A. When the disk mass remains 1 g, the rod length remains unchanged, and the rod mass becomes 10 g, we can compare the values ​​in Table 1 and Table 2 and find that the period has changed from 2.7 to 2.1, the change is 2.1-2.7=-0.6;

Look at option B again, when the disk mass remains 1 g, the rod mass remains unchanged, and the rod length becomes 15 cm, we can compare Table 2 In the value, it is found that the period has changed from 2.7 to 8.0, and the change is 8.0-2.7=5.3;

Looking at option C again, when the disk mass changes from 1 g to 2 g, and other conditions remain unchanged, We can compare the values ​​in Table 2 and find that the period has changed from 2.7 to 3.0, and the change is 3.0-2.7=0.3;

Finally, look at option D. When the disk mass changes from 1 g to 3 g, other When the conditions remain the same, we can compare the values ​​in Table 2 and find that the period has changed from 2.7 to 3.2, and the change is 3.2-2.7=0.5;

Comparing the four options, we find that the modification method of option B can Let period produce the largest change.