103 10 Earth Science

Which one of each sentence that is true about mammals during the Cenozoic era.

a. Many mammals today evolved from primitive mammals with short legs, flat five-toed feet, and small brains.

b. During the Oligocene epoch, a hornless rhinoceros that stood nearly 5 m high had evolved.

c. Saber-toothed cats that evolved during this era can be found in some parts of China today.

d. The mastodon and mammoth died because of major glacial advances.