Which of these would best describe why cells had to evolve to contain a nucleus before more complex, multicellular organisms could develop? a) without a nucleus, early cells did not have the ability to reproduce b) a nucleus allowed organisms to make necessary proteins and regulate homeostasis c) a nucleus had to evolve to hold the dna as simpler organisms did not contain dna d) the nucleus contained the genetic material is one location which made it more efficient to control cellular functions