Final answer:
The rivalry between the East and West coasts led to the murders of Tupac Shakur and The Notorious B.I.G., two prominent figures of '90s hip-hop.
Step-by-step explanation:
The rivalry between East and West coast gangs in the 1990s, particularly among rap artists, is a well-documented episode in hip-hop history. The correct answer to the question regarding the murders of two prominent rappers is a) Tupac Shakur and The Notorious B.I.G.. Tupac Shakur was associated with the West Coast music scene, while The Notorious B.I.G. was a central figure in the East Coast hip-hop community. Their untimely deaths are often attributed to the heightening tensions between the two hip-hop factions during the period, although the direct connections are still subject to debate and investigation.