This graph indicates that the consumer (A) at A is indifferent between 0a of apples and 0b of butter (B) at A is consuming either 0a of apples or 0b of butter. (C) is indifferent between 0a of apples plus 0b of butter on the one hand and 0c of apples plus 0d of butter on the other. (D) is correctly described by all of the above.

This graph indicates that the consumer (A) at A is indifferent between 0a of apples and 0b of butter (B) at A is
consuming either 0a of apples or 0b of butter. (C) is indifferent between 0a of apples plus 0b of butter on the one
hand and 0c of apples plus 0d of butter on the other. (D) is correctly described by all of the above.