Answer:
The correct answer is Walter.
Step-by-step explanation:
A Raisin in the Sun is a story that discusses the importance of family and how they should bond against external forces that tries to divide them.
It is about collective family strength even though each individual is different.
The book focuses on the Younger family who has a conservative mother that is head of the family and ruling the pack single-handedly.
The character that best represents the theme of achieving success in a conventional way is Walter.