C) historical background associated with the park
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.
The answer is D a person who put is on a positive performance under pressure
The internet is the next step.
Answer:
D
Explanation:
Rising action
it's the action that is leading up to the climax.