Features that make this passage informal are:
a.) expression of subjective feelings - It's the way I make them.
c.) incomplete sentences - beat with a wire whisk. Done.
e.) first-person point of view - use of I.
I think the right one is A
the answer is
Ambifuos reference.
It is not clear that the <em><u>it </u></em>as a pronoun reference refers to the fact of singing higher or being different from others.
