Read the following passage: "The Richter scale, developed by Charles F. Richter in 1935, was historically used to measure the magnitude of earthquakes. It is a logarithmic scale, meaning that each whole number increase on the scale represents a tenfold increase in the amplitude of seismic waves, and approximately 32 times more energy released. For example, a magnitude 6 earthquake is ten times larger in wave amplitude than a magnitude 5, and releases about 32 times more energy. While widely known, the original Richter scale is now largely obsolete for large earthquakes, having been replaced by the Moment Magnitude Scale (MMS). The MMS provides a more accurate measure for larger seismic events by considering the total energy released, factoring in the area of the fault rupture, the average amount of slip, and the rigidity of the rock. Despite its replacement, the concept of a logarithmic scale for earthquake measurement remains fundamental." Based on the passage, what does a one-unit increase on the Richter scale signify in terms of energy released?

1. AA doubling of the energy released
2. BA tenfold increase in energy released
3. CApproximately 32 times more energy released
4. DA slight, unquantifiable increase in energy