Next, begin gathering and organizing additional sources to build your argument. It is important to understand the purpose of your research. Evaluate each source, and consider these questions: Who authored the document?
What is the purpose of the document?
When was the document written?
How will this document help your argument?
Use MLA format to create a works cited list in the space provided that includes all relevant sources.

i would say the correct answer is not concrete.

i wish you all a merry christmas!  

and or happy hanukkah

and a happy new year

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.