Twins birth is usually a ________, and lasts ________, twins are in the ________ amniotic sac.
1) vaginal, shorter, same
2) vaginal, shorter, different
3) vaginal, longer, same
4) vaginal, longer, different
5) C-section, shorter, same
6) C-section, shorter, different
7) C-section, longer, same
8) C-section, longer, different