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Maria sat for ten subjects in an examination. Her marks in nine subjects ,excluding science, was as follows:
Mathematics 78, Kiswahili 81, GHC 77, Religious Education 69, English 73, Art and Craft 60, Agriculture 52, Business Education 60, and Home science 55.
If her total marks in the ten subjects was 680, what was her median mark?
A. 60
B. 68
C. 71
D. 75