The graph of $y = f(x)$ is shown below.

[asy]
unitsize(0.5 cm);

real func(real x) {
  real y;
  if (x >= -3 && x <= 0) {y = -2 - x;}
  if (x >= 0 && x <= 2) {y = sqrt(4 - (x - 2)^2) - 2;}
  if (x >= 2 && x <= 3) {y = 2*(x - 2);}
  return(y);
}

int i, n;

for (i = -5; i <= 5; ++i) {
  draw((i,-5)--(i,5),gray(0.7));
  draw((-5,i)--(5,i),gray(0.7));
}

draw((-5,0)--(5,0),Arrows(6));
draw((0,-5)--(0,5),Arrows(6));

label("$x$", (5,0), E);
label("$y$", (0,5), N);

draw(graph(func,-3,3),red);

label("$y = f(x)$", (3,-2), UnFill);
[/asy]

Which is the graph of $y = -f(x)$?

[asy]
unitsize(0.5 cm);

picture[] graf;
int i, n;

real func(real x) {
  real y;
  if (x >= -3 && x <= 0) {y = -2 - x;}
  if (x >= 0 && x <= 2) {y = sqrt(4 - (x - 2)^2) - 2;}
  if (x >= 2 && x <= 3) {y = 2*(x - 2);}
  return(y);
}

real funcb(real x) {
  return(-func(x));
}

real funcd(real x) {
  return(-func(-x));
}

real funce(real x) {
  return(func(-x));
}

for (n = 1; n <= 5; ++n) {
  graf[n] = new picture;
  for (i = -5; i <= 5; ++i) {
    draw(graf[n],(i,-5)--(i,5),gray(0.7));
    draw(graf[n],(-5,i)--(5,i),gray(0.7));
  }
  draw(graf[n],(-5,0)--(5,0),Arrows(6));
  draw(graf[n],(0,-5)--(0,5),Arrows(6));

  label(graf[n],"$x$", (5,0), E);
  label(graf[n],"$y$", (0,5), N);
}

draw(graf[1],(-5,3)--(-2,0),red);
draw(graf[1],arc((-2,2),2,270,360),red);
draw(graf[1],(0,2)--(2,4),red);
draw(graf[2],graph(funcb,-3,3),red);
draw(graf[3],(-3,2)--(-2,0),red);
draw(graf[3],arc((-2,-2),2,0,90),red);
draw(graf[3],(0,-2)--(3,-5),red);
draw(graf[4],graph(funcd,-3,3),red);
draw(graf[5],graph(funce,-3,3),red);

label(graf[1], "A", (0,-6));
label(graf[2], "B", (0,-6));
label(graf[3], "C", (0,-6));
label(graf[4], "D", (0,-6));
label(graf[5], "E", (0,-6));

add(graf[1]);
add(shift((12,0))*(graf[2]));
add(shift((24,0))*(graf[3]));
add(shift((6,-12))*(graf[4]));
add(shift((18,-12))*(graf[5]));
[/asy]

Enter the letter of the graph of $y = -f(x).$
The graph of $y = -f(x)$ is the reflection of the graph of $y = f(x)$ in the $x$-axis.  The correct graph is $\boxed{\text{B}}.$