A pilot must penetrate a thunderstorm. What penetration altitude helps avoid the most critical icing?

1. 1Between the freezing level and the −15 °C level
2. 2At the level of the strongest updraft in the storm
3. 3Below the freezing level or above the −15 °C level
4. 4Exactly at the freezing level, in the middle of the storm

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 7-1-27 Thunderstorm Flying, page 579