The production process of paper umbrellas in our country is very ingenious. As shown in the figure, whether the umbrella is opened or closed, the handle AP always bisects the angle angle BAC formed by the two ribs in the same plane, and AE = AF, DE = DF, so as to ensure that the umbrella ring can slide along the handle. When a toy umbrella is opened, the BDC is on the same straight line. If AB = 50.0, AD = 14.0, then the area of ​​oil paper required to make such a paper umbrella is (don't remember the seam) ()
Choices:
A:48cm^{2}
B:70πcm^{2}
C:2400πcm^{2}
D:2500πcm^{2}
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: The production process of paper umbrellas in our country is very ingenious. As shown in the figure, whether the umbrella is opened or closed, the handle AP always bisects the angle angle BAC formed by the two ribs in the same plane, and AE = AF, DE = DF, so as to ensure that the umbrella ring can slide along the handle. When a toy umbrella is opened, the BDC is on the same straight line. If AB = 50.0, AD = 14.0, then the area of ​​oil paper required to make such a paper umbrella is (don't remember the seam) ()
Choices:
A:48cm^{2}
B:70πcm^{2}
C:2400πcm^{2}
D:2500πcm^{2}
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: The production process of paper umbrellas in our country is very ingenious. As shown in the figure, whether the umbrella is opened or closed, the handle AP always bisects the angle angle BAC formed by the two ribs in the same plane, and AE = AF, DE = DF, so as to ensure that the umbrella ring can slide along the handle. When a toy umbrella is opened, the BDC is on the same straight line. If AB = 50.0, AD = 14.0, then the area of ​​oil paper required to make such a paper umbrella is (don't remember the seam) ()
Choices:
A:48cm^{2}
B:70πcm^{2}
C:2400πcm^{2}
D:2500πcm^{2}