48. Two moving objects start from the origin at the same time, and their velocity–time graphs are as shown in the figure. At the moment when the two objects move in opposite directions, how does the distance between them change?
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[Figure: velocity-time graph showing two lines A and B; line A starts from $-6$ on the V-axis and increases; line B starts from $-4$ on the V-axis and increases with a different slope; time axis shows values 2 and 8 in seconds.] \end{minipage} \begin{minipage}{0.55\textwidth}
- [(1)] Increases by 48 meters.
- [(2)] Decreases by 48 meters.
- [(3)] Increases by 64 meters.
- [(4)] Decreases by 64 meters.
\end{minipage}