Question

CORRECTING SENTENCES BY ADDING APOSTROPHES Choose the word that uses the apostrophe(s) correctly. If a sentence is already correct, choose correct.

The horses heads turned in anticipation when they heard Sarah’s voice.
a.
horse’s
c.
horses’
b.
horses’s
d.
correct

Answer 1

Which ones do you know for sure r wrong?

Answer 2

There seems to be conflicting usage of the apostrophe in the case of words ending with "s". I personally prefer the version without adding an extra "s" after the apostrophe. The "correct" version will be the one given by your teacher or that appears in your notes.
See for example:
http://www.grammarbook.com/punctuation/apostro.asp

Answer 3

Do you think you know what it is?

Answer 4

@Valentina10

Answer 5

So sorry you didn't get any help. For future opentudyers the answer will be A, Horse's
When having more than one you put the ' before the s
When it is just yours, you put it after. :)

Answer 6

@Pinkiexoxo @Valentina10
hint: "the horses head\(\color{red}{s}\) turned...."
so how many horses? One or more than one?
Singular: horse's
plural: horses' (or sometimes horses's) depending on usage, as seen in reference above.
Please read also
http://examples.yourdictionary.com/examples-of-plural-possessive-nouns.html
in addition to reference given earlier.

Answer 7

Awesome!