simple, compound, complex, or compound-complex?

1. Yes, I have a bad case of the flu, and because I need to get well soon, I won’t think about returning to school just yet.
compound

2. Because they have been preserved well over time, many ancient scrolls can be read by those who know Hebrew; included on the scrolls is the oldest spelling of "Jerusalem."
compound complex

3. However, when David came to conquer the city with his army, he discovered that the Jebusites got their drinking water from a spring just outside the city walls.
compound complex

Question

simple, compound, complex, or compound-complex?

1. Yes, I have a bad case of the flu, and because I need to get well soon, I won’t think about returning to school just yet.
compound


2. Because they have been preserved well over time, many ancient scrolls can be read by those who know Hebrew; included on the scrolls is the oldest spelling of "Jerusalem."
compound complex


3. However, when David came to conquer the city with his army, he discovered that the Jebusites got their drinking water from a spring just outside the city walls.
compound complex