1. Which of the following best summarizes the passage? A) The majority of animals in the animal kingdom practice true monogamy.
B) It has been discovered that even fewer animals participate in true monogamy than was previously thought.
C) DNA tests are revealing that fewer species are mating, leading to many different animals’ endangerment.
D) There are no truly monogamous species.

2. The main Idea of the fifth paragraph(lines 17-22) is that

A) Some animals that were thought to have been monogamous were actually participating in outside matings.
B) DNA has revealed that fewer swans are actually monogamous than was previously thought.
C) Most animals mate and raise children with one mate, without ever finding another mate.
D) It has been recently discovered that “extra-pair” compilations are less common than was previously thought.