Final answer:
Phil Spector married Ronnie Spector in 1968, which was significant due to its impact on his personal life, rather than a direct influence on the music industry or the 'Wall of Sound'.
Step-by-step explanation:
In 1968, Phil Spector married Ronnie Spector. This marriage is significant not because of a professional collaboration but because it was a tumultuous and controversial personal relationship that had an impact on Spector's life. While professional collaborations between Phil Spector and artists like Tina Turner, Aretha Franklin, and Bebe King were significant in shaping music production and the rock and roll genre, the marriage to Ronnie Spector did not directly contribute to these aspects.
The option b) is correct, marking a relationship that influenced both Phil Spector's professional and personal life. Phil Spector, a record producer and songwriter, was known for his 'Wall of Sound' production technique and work with various artists that shaped the rock and roll genre. Although Ronnie Spector was also a notable artist, the marriage itself is memorable for its personal, rather than professional, significance.