Question

A spaceship is a machine....is used for travelling in the outer space.
А) -
Б) what
С) which 
Г) that 
Я думаю, либо that, либо which, но забыл какая между ними разница.

Answer 1

Which - которая
That - та
Ответ: Which

Answer 2

 a spaceship is a machine which is used for travelling in the outer