Answer:
do this yourself
Explanation:
your teacher could obvisouly tell if it's your level of writing
<em /><u><em>"She did not understand what happened."
</em></u>It is a complete sentence since it has a subject (she) and a verb (understand), and is independent (i.e. doesn't require another clause to make sense<u><em>
</em></u>
D:a peace of land projecting into water