To my mind, the answer ( B ) is the inappropriate sentence. In a formal writing informal tone must be avoided as well as colloquial expressions.
The word in the sentence which the underlined phrase
modifies is:
D. Marcella
<span>The phrase adds an idea where the noun “Marcella”
is resting. Therefore it answers the question “where”. This is an example of
prepositional phrase which functions as an adjective. </span>