What does it imply if a function declares an opaque return type 'some View', but the return statements in its body do not have matching underlying types?
A. The function's return type is inconsistent, leading to a compilation error because the underlying types of the returned values do not match the declared opaque type.
B. The function's return type is correct, but the values returned are not visible to the compiler.
C. The function will automatically cast the return values to match the opaque type, avoiding any errors.
D. The function is designed to return different types, and the opaque return type allows for this flexibility without any issues.