Definition of a structure (A) allocates memory for a structure variable, (B) creates a template, (C) A and B, (D) none of these. The following declaration is (A) valid, (B) valid but doesn’t allow...

Definition of a structure (A) allocates memory for a structure variable, (B) creates a template,

(C) A and B, (D) none of these.

The following declaration is (A) valid, (B) valid but doesn’t allow creation of a second variable,

(C) valid but doesn’t allocate memory, (D) not valid.

struct {

char x;

} x;