Which of the following correctly declares and initializes alpha to be an array of four rows and three columns with the component type int?

a$.$ int alpha$[4][3]=\{\{0,1,2\},\{1,2,3\},\{2,3,4\},\{3,4,5\}\}$;

b$.$ int alpha$[4][3]=\{0,1,2$; $1,2,3$; $2,3,4$; $3,4,5\}$;

c$.$ int alpha$[4][3]=\{0,1,2$: $1,2,3$: $2,3,4$: $3,4,5\}$;

d$.$ int alpha$[4][3]=\{\{0,1,2\}\{1,2,3\}\{2,3,4\}\{3,4,5\}\}$;