Assuming that x and y have both been properly declared as int variables, which of the following if/else statements is equivalent to the switch statement. Could you explain the solution?

switch (x) {

 case 2: y = 3; case 5: y = 7; break; case 7: y = 9; 

}

a)

if(x==2)y=3; else if (x == 5) y = 7; else if (x == 7) y = 9;

b)

if(x==2||x==5)y=7; else if (x == 7) y = 9;

c)

if(x==2)y=7; else if (x == 5) y = 7; else y = 9;

d)

none of the above.

e)

both B. and C.