Answer:
1. both 2. was a 3. but 4. whole 5. have
Explanation:
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.
The second one
is the best
The answer is D. It helps you revise your research focus as you uncover more information
It lets the reader know where important information is located.