Which statements apply to conservative diving methodology regarding decompression sickness avoidance?

Conservative diving methodology emphasizes safety and risk reduction when planning and executing dives. One key practice is to conduct deeper dives first before transitioning to shallower dives. This approach helps mitigate the risk of decompression sickness, as the body's off-gassing rate improves at shallower depths where we can ascend more safely.

By diving deeper initially, divers can take advantage of the body's physiological responses, where it is more efficient to off-gas nitrogen—especially after a deep dive. The subsequent shallower dives allow for gradual acclimatization and proper de-nitrogenation during the ascent. Thus, planning to conduct deeper dives first aligns with conservative diving practices focused on enhancing dive safety.

In contrast, rounding all calculations and numbers up does not necessarily address the avoidance of decompression sickness. Planning around worst-case scenarios and using more conservative ascent rates are important, but they do not directly correspond with the principle of conducting deeper dives first for successful decompression management. Furthermore, the ascent rates mentioned are excessively rapid and can increase the risk of decompression sickness, which diverges from conservative methodologies.