Final answer:
The question lacks sufficient information to calculate the average velocity over the time interval [3,4]. Additional details such as a position vs. time graph, velocities, or a motion equation are needed to solve for average velocity.
Step-by-step explanation:
To find the average velocity over a given time interval, you would typically use information from a position vs. time graph or a given mathematical function describing the motion. However, since the question doesn't provide a graph or a function, nor does it give the starting and ending positions or velocities, it's not possible to calculate the average velocity with the information given.
To calculate average velocity, you would normally subtract the initial position from the final position, then divide by the time elapsed. The formula is:
Average Velocity = (Final Position - Initial Position) / (Final Time - Initial Time)
Without additional details, it's not feasible to select a correct answer from the options provided. Please provide either the position vs. time graph, the velocities at times 3 and 4 seconds, or the mathematical function describing the motion of the object.