A.disgusting
Gruesome is defined as something that is unpleasant or disgusting
Hope this helps!
The answer would be D, because a theme is the subject of a talk; piece of writing, thoughts, etc..
Because you have to fit the context clues together like a puzzle
1. under - sub
2. beyond - ultra
3. bend - flect
4. all - omni
5. touch - tac
6. within - intra
7. lead - duct
8. burst - rupt
Oblivious - Not aware of what is going on around you.