A suffix meaning full of would be -ful.
E.g. Hateful, graceful, pitiful, etc.
When finding an interjection, think about comics. An interjection is exclamation that is used to express a feeling. When finding an interjection, think about comics and all the expressions they use like 'bam', 'pow', etc. Like I said, one of the cheats to finding an interjection is to think about comic books.
Answer: C) Wow
The answer would be d, because the whole point of the line was for band tryouts to find a new guitarist. I hope this helps.