Answer:
How to avoid getting scammed in foreign (European) countries
Where to find tour guides to help you through your country of choice
Those are just a few that you said you needed. If you need more I may be able to come up with a couple extra. It's kinda hard though!
The answer would be C. The committee's bickering was seriously impeding any real progress.
impede would translate to preventing...such as preventing progress.
To me security means safety and protection and the measures taken to be safe or protected.
To determine the root cause of contamination