Complex sentence: From 1980 to 1985, CSC continued to grow and received an infusion from the sale of its subsidiary company, the "Delaware Charter Guarantee & Trust Company", which it had acquired in 1977.
Split into simpler sentences: From 1980 to 1985, CSC continued to grow. It received a cash infusion from the sale of its subsidiary company, the "Delaware Charter Guarantee & Trust Company," which it had acquired in 1977.