The last major glacial period began about 2,000,000 years before present and is commonly known as

The correct answer is: A. Pleistocene or ice age.

The Pleistocene epoch is the geological epoch that lasted from about 2,588,000 to 11,700 years ago, spanning the world’s most recent period of repeated glaciations. The end of the Pleistocene corresponds with the end of the last glacial period and the beginning of the Holocene epoch. The Pleistocene is divided into the Gelasian, Calabrian, Ionian, and Tarantian stages.

The Pleistocene epoch is sometimes referred to as the Ice Age, although this term can also refer to the entire Quaternary period, which includes the Pleistocene and Holocene epochs. The Pleistocene was a time of great climatic change, with alternating periods of glaciation and interglacial periods. The glaciers during the Pleistocene epoch covered much of the Northern Hemisphere, including North America, Europe, and Asia. The glaciers reached their maximum extent during the Last Glacial Maximum, which occurred about 20,000 years ago.

The Pleistocene epoch was