Answer: d. Jones (2006) stated the results of the study directly correlate with the challenges.
Explanation: A citation is a quotation or reference to a book, paper, or author. When including a citation, state the name of the author followed by the year of publication in parenthesis. The page or paragraph number is only required for directly quoted material.
The subject is mother and the mood seems very demanding
D. parallel structure just means that all of your verbs in the comma series line up in regards to tenses, here. in choice D, it's "BE friendly," "INTRODUCE yourself," and "SMILE." these are all present tense verbs.
the rest of the choices don't match--"exercise" and "stretching" are two different verb forms in choice A, "to go to the library" is the odd one out in choice B, ane "to build" doesn't match with the "-ing" verbs in choice C.