Unfortunately yes fortunately it hasen't happened yet hope this helps THE ANSWER IS YES
The second option on the list is the correct one.
"Parallel sentence structure" basically means that the sentence uses repetitive phrasing and the two clauses will generally be close to the same length.
None you should invest a quarter and put the rest away.
Answer:
The central idea is that using the invisible ink was a good choice because the other side couldn't tell what it said.