She wants you for a lifetime but if your gonna think twice at all she don't wanna know. Everything is just fine but if your gonna think twice at all she don't wanna know at all.

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b