Which headline is the best choice and why? a
"Teen boot camp is ‘strictly’ a good idea" / Because it avoids most "to be" verbs.
b
"Teen boot camp – ‘strictly’ a good idea" / Because it avoids all "to be" verbs.
c
"The teen boot camp is a very good idea."/ Because it begins with "the".

C is the answer because it sounds more civil rather than random. it gives you a lead-" The teen boot camp is actually really good" it allowes you to explain it without it sounding off

the correct answer is a. how to make proposal that works.

indeed, the register is quite formal and the tone is especially objective as it avoids the use of the first and second person singular (i, you) and opts instead for the third person plural which is more impersonal and focuses on the data and the argument that is being developed by the author. the formality adds the impression of respectability to the work and the impersonality adds objectivity to it.