Consider the following statements:

struct rectangleData

$\{$

float length;

float width;

float area;

float perimeter;

f;

rectangleData bigRect;

Which of the following statements correctly initializes the element length of bigRect?

a$.$ bigRect $=\{10\}$;

b$.$ bigRect.length $=10$;

c$.$ length $[0]=10$;

d$.$ bigRect$[0]=10$