$$1$$,$$2$$,$$3$$,$$5$$,$$8$$,$$13$$,$$21$$,$$34$$,$$55$$,$$89$$ 
A tortoise is running along a $$5$$ metre track. It can run either half a metre or a metre every second. How many different ways can the tortoise finish the track? 
Options:
A: $$72$$ 
B: $$89$$ 
C: $$91$$ 
D: $$56$$ 