The most recent ice age began

5,000 years ago

two to three million years ago

15,000 years ago

one million years ago

The correct answer is B.

The last ice age began 2.6 million years ago and ended about 11,700 years ago.

The correct answer would be two to three million years ago.

Explanation:

The Quaternary glaciation, also known as the Pleistocene glaciation was the most recent ice age which began about 2.6 million years. Major extinctions event of large mammals or megafauna which include mammoth, mastodons, glyptodons and others began late in this ice age.

Thus, the correct answer would be two to three million years ago.