Clock shows the correct time after a $$12-$$hr loss. With a $$10-$$min. loss daily, it takes $$6$$ days to lose $$1$$ hr \& $$72$$ days to lose $$12$$ hr. 
A $$12-$$hour clock loses $$10$$ minutes each day. The clock will first return to the correct time in． 

A. $$36$$ days 
B. $$72$$ days 
C. $$120$$ days 
D. $$144$$ days 
E. $60$ days 