已知椭圆\(C:\frac{{{x^2}}}{4} + {y^2} = 1\)经过点\(P\left( {m,n} \right)\)，则\({m^2} + {

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已知椭圆\(C:\frac{{{x^2}}}{4} + {y^2} = 1\)经过点\(P\left( {m,n} \right)\)，则\({m^2} + {n^2}\)的取值范围是\((\quad )\)

A.\(\left( {0,1} \right]\)

B.\(\left( {0,4} \right]\)

C.\(\left[ {4, + \infty } \right)\)

D.\(\left[ {1,4} \right]\)

参考答案：D