Tubal Ligation Involves Cutting or Blocking a Woman's Fallopian Tubes

Tubal ligation involves cutting or blocking a woman's fallopian tubes. Why would this procedure prevent pregnancy?

A) It stops the release of sex hormones.
B) It prevents the release of eggs during ovulation.
C) It inhibits the thickening of the endometrium.
D) It keeps sperm from reaching eggs.
E) It blocks entry of sperm into the uterus.