Answer :

To find the best answer to the question \(0.34 \times 9\), let's go through the steps:

1. Understand the multiplication:
- We need to multiply \(0.34\) by \(9\).

2. Multiply the numbers:
- The product of \(0.34\) and \(9\) is calculated as \(3.06\).

3. Select the best answer:
- Given the product of \(0.34\) and \(9\) is \(3.06\), we need to check the options provided.

4. Compare with the options:
- Option A: \(0.306\)
- Incorrect, as it places the decimal incorrectly.
- Option B: \(30.6\)
- Incorrect, as it exaggerates the value by a factor of 10.
- Option C: \(3.06\)
- Correct, as it matches the calculated value.
- Option D: \(0.0306\)
- Incorrect, as it underestimates the value.

Therefore, the best answer is:

C. [tex]\(3.06\)[/tex]