Which course of action would an editor need to take to correct the modifier/comparison error in the following passage?

"Your brother has been behaving strangely lately," Theo remarked. "I mean, I know he

Read passage and select the option that illustrates the best course of action for an editor to take.

Which one does NOT contain a grammar or usage error?

Carefully read the following options that together form a passage and identify the option that contains an error in word choice or spelling.

Editing option that best corrects the underlined part of the following sentence.

Which sentence does NOT require editing to correct errors in word choice, word usage or spelling?

Read passage and select best option for an editor to take.

The following sentence is devoid of punctuation. Which editing options turns it into a coherent, plausible sentence?

Editing option that corrects the underlined part of the following sentence.

Identify the error contained in the following sentence.

Read passage and select line that contains an error in verb tense consistency.