Answer:
1 is dependent and 2 is independent
Step-by-step explanation:
Carmen was very hungry (first action)
stopped at the deli (second one)
bought a sandwich (third one)
All the actions are DEPENDENT by the previous use of the SINCE
Well
The train was running late as usual (this action happens frequently = AS USUAL)
So this action doesn´t depend on the subsequent (Kristen decided to call a taxi).