Select the abbreviation that tells how the italicized noun clause is used.
s-subject, do-direct object, sc-subject complement, op-object of preposition
the company rules demanded that the monthly bills be paid before the end of the month.
do
sc
op
s

The noun clause italicized here can be used as the SC which is subject complement.

Option 2.

Explanation:

In English Grammar, Subject Complement or the predicative of the subject is a predicative expression that follows a verb which is a linking verb. The subject complement has to complement the subject by either changing the name, renaming it or describing the subject.

The basic purpose of the Subject Complement is that it completes the meaning of the subject. It always is a noun, pronoun or an adjective. The noun or pronoun will rename the subject and the adjective will describe the subject. It is always followed by a linking verb.

Subject complement is the correct answer.

Explanation:

In grammar, subject complement refers to a word or a series of words that follows a linking verb (used to identify a subject) and it identifies or describes the subject; in other words, it refers to the complement that gives us more information about the subject. Some of the most common linking verbs are smell, seem, taste, be, this last one is used in the sentence.

yes

explanation:

i have heard the mermaids singing, each to each.

i do not think they will sing to me