Answer:
"Definition" Matches with " given an explanation of the unfamiliar word right in the sentence".
"Inference" matches with " Provides the general sense of an unfamiliar word with the main Idea of a sentence or paragraph"
"Synonym" matches with restates the unfamiliar word with another familiar word.
"Antonym" matches with contrasts the unfamiliar word with an opposite.
It should be C. because interrogative pronouns are used to ask questions.
C is the answer you are looking for
The Gateway Arch- Common Noun
St. Louis, Missouri- Proper Noun
Hope this helps :)