Question

Check the item that is not one of the four kinds of misplaced modifiers studied in this section.

absolute modifiers
improperly placed adverbs
split infinitives
misplaced phrases and clauses

Answer 1

I believe it is "Absolute Modifiers" but I am uncertain, I hope it is and that this helps.

Answer 2

absolute modifiers

A misplaced modifier is one that is unclear in a sentence. It is placed in such a way that the reader does not know what the modifier is referring to. Improperly placed adverbs, split infinitives, and misplaced phrases and clauses are all unclear in a sentence. They can lead to confusion and misunderstandings. However, absolute modifiers are words that don't need any further modifying. A few examples are perfect or complete. You can't get any better than perfect or more complete than complete.