Which of the following would not be an indication of placental detachment（）

A. An abrupt lengthening of the cord.

B. An increase in the number of contractions.

C. Relaxation of the uterus.

D. Increased vaginal bleeding.

新航路开辟后，下列哪一地区没有遭到西班牙的侵略？ [ ]

A、墨西哥

B、阿根廷

C、巴西

D、古巴