The young girl was remarkably <em><u>self-confident</u></em> when she was giving her speech.
Explanation:
<u>Hyphens</u> are used to connect <u>two words</u> and result in a complete idea. They are used to create <u>compound modifiers</u>, which are adjectives on a sentence always placed before the noun.
Hyphens are also used for <u>compound word</u>s such as <em>brother-in-law</em> or <em>twenty-year-old</em>.
Examples of hyphens in compounds:
Sun-kissed is a compound modifier that indicates something is warm.
Daughter-in-law is a compound word that refers to the wife of the mother's son.
The best option is D studied. This word denotes a measured, even-handed approach to the issue. So, it should be :Current immigration policy must be studied before new proposals can be made.