Question

Can you avoid the dangling modifier(s)? Select all of the correctly written sentences.

Answer 1

When studying, you should review your notes.

The "you" that follows the 'studying' is the appropriate subject. "You" are doing the "Studying", so the sentence is clear and grammatically correct without using a dangling modifier which would make it unclear. 

Answer 2

Answer:

When studying, you should review your notes.

Explanation:

This is the only one because in this one, you provides a proper subject to the verb "studying" in the beginning of the sentence. In the others, you cannot point clearly to the subject, therefore, the first phrases are dangling modifiers.