As shown in the figure, the length of the generatrix of the cone is 5.0, and the length of the height line is 4.0, then the bottom area of ​​the cone is ()
Choices:
A:3πcm^{2}
B:9πcm^{2}
C:16πcm^{2}
D:25πcm^{2}
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: As shown in the figure, the length of the generatrix of the cone is 5.0, and the length of the height line is 4.0, then the bottom area of ​​the cone is ()
Choices:
A:3πcm^{2}
B:9πcm^{2}
C:16πcm^{2}
D:25πcm^{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: As shown in the figure, the length of the generatrix of the cone is 5.0, and the length of the height line is 4.0, then the bottom area of ​​the cone is ()
Choices:
A:3πcm^{2}
B:9πcm^{2}
C:16πcm^{2}
D:25πcm^{2}