Correct Answer: Applicable

Solution : The correct option is the second option.

Explanation:

Impossible denotes something that cannot be done or achieved. Its opposite would be a word indicating the feasibility or applicability of something. Applicable fits this context, as it means relevant, suitable, or capable of being applied.

The meanings of the other options are as follows:

1. Shaky: This word conveys a sense of instability or uncertainty.
2. Unsure: This option implies a lack of certainty or confidence.
3. Unlikely: This word suggests a low probability.