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Given P(x)=x4+ax3+bx2+cx+d such that x=0 is the only real root of P(x)=0. If P(1)<P(1), then in the interval [1,1]


( A ) P(-1) is not minimum but P(1) is the maxium of P
( B ) P(-1) is the minimum and P(1) is the maximum of P
( C ) P(-1) is the minimum and P(1) is not the maximum of P
( D ) neither P(-1) is the minimum nor P(1) is the maximum of P

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