Please help me with this question ​

The first step in making a mental model for a compare-and-contrast text is a. comparing the two things being described. b. finding important details in the text. c. contrasting the two things being described. d. connecting details to what is already known.

Select the sentence with the dangling modifier. which highlighted ones is it? it can only be one.

Select all of the grammatical structures which require objective pronouns