Which of the following paths is most likely to support long-distance propagation on 160 meters?

The 160-meter band is heavily affected by D-layer absorption during daylight hours. Because the D-layer absorbs lower-frequency HF signals rather than refracting them, daytime long-distance communication on 160 meters is virtually impossible. When the sun sets, the D-layer quickly dissipates, allowing signals to reach the higher E and F layers where they can be refracted back to Earth. Therefore, the best chance for long-distance propagation on this low-frequency band occurs when the entire path between the transmitting and receiving stations is in complete darkness.