Is It Enough to Have a Lawyer? Must the Lawyer

Is it enough to have a lawyer? Must the lawyer also be competent and effective? The Supreme Court has recognized the effective assistance of counsel as essential to the Sixth Amendment guarantee (McMann v. Richardson 1970) .
-In regards to ineffective assistance of counsel, appellate courts must reverse only if the proceedings were fundamentally unfair and

A) the outcome would have been different if counsel had not been ineffective
B) the outcome would have been worse if counsel had not been ineffective
C) the outcome would have been better if counsel had not been ineffective
D) the outcome would have been the same if counsel had not been ineffective