Best way to write constructor of a class who holds a STL container in C++11

Question

class Foo {
  std::vector data_;
};

Say Foo can only be constructed by make a copy (technically I mean a copy or move)

Answer 1

class Foo {
  using data_t = std::vector;
  data_t data_;
public:
  constexpr Foo(data_t && d) noexcept : data_(std::forward(d)) {}
};