The diameters of \odot J and \odot K are on the same line with points A, B, C, and D. Circle J has a radius of 10 units, \odot K has a radius of 8 units, and B C = 5.4 units. Find J K.
Choices:
A:12.6
B:14.6
C:20.6
D:30.6
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: The diameters of \odot J and \odot K are on the same line with points A, B, C, and D. Circle J has a radius of 10 units, \odot K has a radius of 8 units, and B C = 5.4 units. Find J K.
Choices:
A:12.6
B:14.6
C:20.6
D:30.6
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 diameters of \odot J and \odot K are on the same line with points A, B, C, and D. Circle J has a radius of 10 units, \odot K has a radius of 8 units, and B C = 5.4 units. Find J K.
Choices:
A:12.6
B:14.6
C:20.6
D:30.6