Ideas expressed in literature of most countries, cultures, and era
I think that’s what you’re asking,,,,?
Compound modifiers. These are formed when two or more adjectives or attributes or distinguishable units are combined together to form a single noun or a unit. Normally such modified words are combined using hyphens.
Answer:

Explanation:
9 x 9 x 9 x 9 is 9 multiplied by itself four times, so it's 9 to the 4th power as typed above.
The correct answer should be C) bias
If the person works for a national energy company there is high chance that the person would be a bit biased towards installing the new systems. This should definitely be checked.
The correct answer would be D!