Which type of blood stain is characterized by streaks or smudges?

The correct choice reflects the nature of blood stains that result from wet conditions, where blood is usually fluid and still in a liquid state. When blood emerges from a bleeding injury or a wet environment, it may be smeared or streaked as it comes into contact with surfaces. This smudging effect often happens because the blood hasn't fully coagulated and retains its liquid state, allowing it to spread and create distinct streaks or smudges on materials or surfaces it encounters.

On the contrary, blood from a dry surface would typically appear more contained and defined, as the liquid has already dried and formed a solid stain. Blood from solid impacts would have a different appearance, usually resulting in more splatter patterns rather than streaks. The option that indicates it cannot be determined does not apply here since we can clearly analyze how blood behaves under different conditions, particularly in a wet state.