The picture shows a small paper cap with a conical chimney. The length of its generatrix l is 13.0 and its height h is 12.0. The area of ​​paper required to make this paper cap is (the seams are ignored) ()
Choices:
A:60π
B:65π
C:78π
D:156π
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: The picture shows a small paper cap with a conical chimney. The length of its generatrix l is 13.0 and its height h is 12.0. The area of ​​paper required to make this paper cap is (the seams are ignored) ()
Choices:
A:60π
B:65π
C:78π
D:156π
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 picture shows a small paper cap with a conical chimney. The length of its generatrix l is 13.0 and its height h is 12.0. The area of ​​paper required to make this paper cap is (the seams are ignored) ()
Choices:
A:60π
B:65π
C:78π
D:156π