Correct Answer: To be in charge or control of a situation

Solution : The correct choice is the first option.

The idiom "to be in the driving seat" is often used to convey the idea of being in a position of authority, leadership, or control, similar to a person driving a vehicle from the driver's seat. The person in the driving seat has the power to influence and make decisions, and this reflects the broader meaning of being in control or charge of a situation.

Therefore, among the given options, the appropriate meaning of the given idiomatic expression is to be in charge or control of a situation.