Rewrite the following sentence using a commonly used phrase instead of the highlighted phrase.
This is undoubtedly a major contributor to the issue.
This certainly plays a big role in the problem.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the following sentence using a commonly used phrase instead of the highlighted phrase.

### Input:
This is undoubtedly a major contributor to the issue.

### Output:
This certainly plays a big role in the problem.