Determine Whether the Sequence Is Geometric $55,50,45,40 , \ldots$ A)Geometric Sequence $r = 4$

Multiple Choice

Determine whether the sequence is geometric.If so, find the common ratio. $55,50,45,40 , \ldots$

A) Geometric sequence, $r = 4$
B) Geometric sequence, $r = 6$
C) Geometric sequence, $r = 5$
D) Geometric sequence, $r = 7$
E) Not a geometric sequence