We first need to identify what a superlative form of an adjective is. That is when the adjective is put in a comparison, and is done so in it's higher form. For example, take the adjective "great". The superlative form would be "greatest". That would imply that there are, including the object that the superlative adjective is describing, 3 or more things. So, you use it only when comparing 3 or more nouns.
Answer:
Water
Explanation:
With no one managing the cities vast and complicated tap water and sewer networks there would be flooding
Answer:
C. All of our school's cafeterias were closed during spring break.
Explanation:
Plural nouns are those nouns that are more than one. They are either identified by the addition of (s) in the noun or in some cases (ives).
Possessive nouns are those nouns which show the possessive nature of the noun. It is an indication of the possession of the thing by the noun. It is indicated by the addition of ('s) in the noun.
So, from the sentence given in the options, the cafeteria is the property of the school so it will be indicated as "the school's cafeteria". Also, the cafeterias talked about is more than one so it will be indicated in the plural sense, thus adding (s) in the noun.
Thus, the final sentence will be
All of our <em>school's</em> <u>cafeterias</u> were closed during the spring break.
<em>* School's</em> is the possessive noun while<u> cafeterias</u> is the plural noun.