I believe it’s B. because his father told him not to go onto the ice and George knew what he was doing would probably have a consequence behind it so hesitates contemplating whether or not should he listen to his father or go on the ice and show his friends he’s not scared or whatever. :>
A subject is the one being discussed in the sentence. In the question about, Who functions as the subject. It is the receiver of the action-- <em>left a pair of mittens on the ground. </em>The direct object is the <em>pair of mittens</em>. It's not possessive because it's not asking about ownership. <em>Park </em>is the object of the preposition.
ANSWER: A