Which of the following statements is false?

a. A lambda that receives two ints, x and y, and returns their sum is
```
(int x, int y) -> {return x + y;}
```
b. A lambda’s parameter types may be omitted, as in:
```
(x, y) -> {return x + y;}
```
c. A lambda with a one-expression body can be written as:
```
(x, y) -> x + y
```
In this case, the expression’s value is implicitly returned.
d. When a lambda's parameter list contains only one parameter, the parentheses may be omitted, as in:
```
value -> System.out.printf("%d ", value)
```

b. A lambda’s parameter types may be omitted, as in:
```
(x, y) -> {return x + y;}
```