Read the sentence a student wrote. as he listened to the haunting notes of the song the author realized he had found the inspiration for his next suspense novel. the teacher reviewing this sentence would point out that since this is a:

Based on the above text, a teacher reviewing this sentence would point out that "song" should be followed by a comma because it is a complex sentence.

So Option A is correct.

The other options are incorrect as:

Thus Option A is correct for this sentence.

For more information about complex sentences refer to the link:

link

The teacher reviewing this sentence would point out that since this is a complex sentence, there should be a comma after “song.”

Explanation:

In order to divide or separate a portion of sentence like products in lists, clauses etc than the punctuation mark used is termed as “comma” in many languages and contexts. Here in above given complex sentence the dependent clause is “ As he listened to the haunting notes of the song” while independent clause is “ the author realized he has found the inspiration for his next suspense novel”.

Both of these different type of clause is separated with the help of comma while conjunction is applicable in  compound sentences which is constructed from independent clauses and conjunction connects them.

american political culture includes a plenty of focus views and preferences. not all westerns experience the same opinions, of course, but the large preponderance promises to these general ideas, including equality, justice, freedom, individualism, integrity, and difference.

the united states is a democratic republic. residents elect representatives to governmental, nation, and local administration; those deputies create the regulations that command u.s. community. although emptiness in u.s. law needs it, in usage, the administrative system is ruled by executive factions.