Wind Blowing Over the Cables of a Bridge Sheds Alternating

Wind blowing over the cables of a bridge sheds alternating vortices resulting in oscillating forces acting on the cables. Which of the major parameters listed in Eq. 6.2.17 are the primary
Parameters which would be used in the description of this situation?

A) Re and St
B) Fr and St
C) St and M
D) Re and M