which answer correctly calls the WildCard function?

Given the function prototype:
double WildCard(char f[]);

A. float z; char face[10]; z = WildCard(face);
B. double z; char face[10]; z = WildCard(face);
C. double z; string face; face = WildCard(z);
D. int z; int face[10]; face = WildCard(z);

B. double z; char face[10]; z = WildCard(face);