In the novel "The Absolutely True Diary of a Part-Time Indian" by Sherman Alexie, the following motifs can be identified from the given options:
a. Alcoholism
d. Racism
Both alcoholism and racism are recurring themes throughout the story and play significant roles in shaping the experiences of the main character, Arnold Spirit Jr., also known as Junior. The novel explores the impact of alcoholism on Junior's family and community, as well as the effects of racism on his personal identity and relationships.