Complex sentence: After two years of recording and development, he decided to dismantle the group in support their individual pursuits for a solo career, which lead to major record deals for 2 out of the 3 girls.
Split into simpler sentences: After two years of recording and development, he decided to dismantle the group in support of their individual pursuits for a solo career. This lead to major record deals for 2 out of the 3 girls.