look at key words.
<em>you must</em>
think about what its saying you must do.
<em>protect your water pipes against freezing</em>
now look and see why you must do it
<em>they can rupture and cause significant damage to your home</em>
now you should be able to figure out what type it is...
i hope this helps, this is what i do to help
A. In the yearbook, it lists the names of all faculty and staff. In this sentence, it is uncertain as to what the pronoun "it" is referring to.
