Although in classical mechanics a physicist can definitely predict both the position and the velocity of an object, in ordinary quantum mechanics certainty in predicting one of those values comes only at the expense of uncertainty about the other.
(A) certainty in predicting one of those values comes only at the expense of uncertainty about the other
(B) certainty in predicting one value comes only at the expense of uncertainty about another
(C) predicting one of those values definitely is Anly at the expense of the other' s uncertainty
(D) only at the expense of uncertainty about another value can you predict one of those values with certainty
(E) If you definitely predict one of those values it is only at the expense of your uncertainty about the other

[spoiler] A
but pls explain why B is wrng.... its making sense even w/o "those"[/spoiler]