Alyssa's career most likely falls in pathway D. National Security. This is indicated by her involvement in investigating a cyber-attack on the Pentagon, which is a critical aspect of national security.
Here's why:
1. Investigating cyber-attacks on governmental institutions like the Pentagon falls under the umbrella of national security, as these attacks pose significant threats to a country's security and defense systems.
2. The mention of the importance of her work and the understanding shown by her family further emphasize the seriousness and significance of her role in safeguarding national security interests.
3. The nature of the investigation requiring extensive time commitment aligns with the complexity and thoroughness typically associated with national security investigations.
Therefore, based on the context provided, Alyssa's career pathway aligns most closely with National Security due to her involvement in investigating a cyber-attack on a vital governmental institution.