Let us take a look at our choices here.
A. To get to the playground, you should follow the paved path.
A very decent sentence, doesn't seem to be anything wrong, but let's continue anyway.
B. To get to the playground, the paved path should be followed.
Who's talking, Gollum? And should be followed by whom? Doesn't make much sense, so we can move on.
C. To get to the playground, the paved path should be followed by you.
...
Okay, that's just getting too complicated. This sentence could be simplified quite a bit.
Answer A is the only one that presents the information at hand in a concise and logical way, with no misplaced or dangling modifiers.
Hope that helped =)
