Which of the following developments in seismic technique would the author view as the greatest aid in the detection of stratigraphic traps?
1) Further research into the origin of stratigraphic traps
2) The development of a means of filtering all noise out of seismic sections
3) The development of a seismic source with an extremely high frequency that does not attenuate over distance
4) The discovery of a means of increasing the attenuation of high-frequency seismic wavelets within the earth