Which form of punctuation is missing in the sentence?

I asked someone's help in getting a new scratching post from a high shelf.

Apostrophe
semicolon
colon
hyphen

Question

Which form of punctuation is missing in the sentence?

I asked someone's help in getting a new scratching post from a high shelf.

Apostrophe
semicolon
colon
hyphen

anonymous · Answer

simicolon

anonymous · Answer

I believe. :)
could be a hyphen.

not an apostrophe or a colon.

anonymous · Answer

I asked someone's help, in getting a new scratching post from a high shelf.
                                  ^Colon     
I ran the sentence through a punctuation checker and the sentence both ways your and mine seems to be free and clear of any problems.