Complete the sentence below with the most appropriate prepositions:

"The professor insisted___the importance of clarity___academic writing and advised students to reflect___their feedback before submitting the final version."

Choose the alternative that correctly and respectivelycompletes the sentence above.

Read the short dialogue below and answer the question:

A:Did you finish the report?

B:I tried, but it wasn't easy. I asked Mark, but he didn't know much about it either.

A:Did he at least send you the files?

B:No. Said he'd do it later.

Which of the following best explains a cohesive mechanism used in this dialogue?