Explanation:
Note, in the English Language, the term modifier refers to a word, phrase, or clause that is used to modify (or adds meaning to) other words in a sentence. Note, the modifier of the sentence is bolded.
1. "On her way, Jan found a gold man's watch." Here, the word 'a' (a proposition) acts as a modifier of the word, <em>"gold man's watch".</em>
<em>2. </em>"The child ate a cold dish of cereal for breakfast this morning." Here, the phrase<em>"a cold dish of" </em>modifies the word "child ate", And the word, <em>"this" </em>modifies the word "morning".
3. "The torn student's book lay on the desk." Here, the word, <em>"on the"</em> acts as the modifier of the phrase, "The torn student's book lay".
4. "Just John was picked to host the program," Here, the phrase <em>"was picked to" modify the phrase, "</em>host the program".
A <em>prepositional phrase </em>refers to the phrase which begins with a preposition and ends with the 'objects' of the prepositions that are nouns, gerund, clause or pronoun.
The pattern of the <em>prepositional phrase</em> follows by the object of the preposition having one or more modifiers.
Therefore, in the above sentence, the prepositional phrase is C. down the street.
<em>'down'</em> is a preposition followed by the modifier <em>'the street'</em> as a noun.
Answer:
Aids is a worldwide problem
