Answer:
When n is 1
5-2n
=5-2*1
=5-2
=3
When n is 2
=5-2*2
=5-4
=1
When n is 3
=5-2*3
=5-6
=-1
When n is 4
=5-2*4
=5-8
=-3
When n is 10
=5-2*10
=5-20
=-15
D appears to be a regular polygon ..
The definition of a polygon is to have all the same angles which appears to be D
they should move away from the freeway