Complex sentence: A landmark in Avant's career, the album has sold a little over 1.3 million copies in the U.S. and 4.4 million worldwide and has received generally positive reviews by critics.
Split into simpler sentences: A landmark in Avant's career, the album has sold a little over 1.3 million copies in the United States and sold 4.4 million worldwide. The album has received generally positive reviews by critics.