Is saying a three-month's period gramatically acceptable and correct?

Kthe pleasure of all living things in baldur's presence means the happiness that the sunlight brings; the sorrow of all living things at his death means the gloom of northern countries when winter comes. reread the two sentences in paragraph 7. what is the best way to improve these sentences. if there are no problems, choose correct as is.' a) correct as is. b) the pleasure of all living things in baldur's presence means the happiness that the sunlight brings; the sorrow of all living things at his death means the gloom that the winter brings. c) the pleasure of all living things in baldur's presence meant the happiness that the sunlight brings, and the sorrow of all living things at his death meant the gloom of a northern winter. d) the pleasure of all living things in baldur's presence means the happiness that the sunlight brings. the sorrow of all living things at his death means the gloom of northern countries when winter comes.