Final answer:
Marley visits Scrooge in Act I to inform him about the impending visitation of Three Spirits and to rescue Scrooge from a fate similar to his own.
Step-by-step explanation:
In Act I of A Christmas Carol: Scrooge and Marley, Marley's ghost visits Scrooge for two main reasons. The first reason, as indicated in choice C, is to inform Scrooge that the Three Spirits will haunt him. This visitation serves as a warning that these spirits will guide Scrooge through a journey of self-reflection and change. The second reason, aligned with choice E, is to rescue Scrooge from sharing Marley's own doomed fate after death. Marley comes to Scrooge burdened by the heavy chains of his past misdeeds, seeking to prevent his old business partner from suffering a similar posthumous burden.