What Is the "Chicken-And-Egg" Type Problem We Face When Trying

Multiple Choice

What is the "chicken-and-egg" type problem we face when trying to decide which came first-proteins or nucleic acids?

A) proteins and nucleic acids probably looked very different before the origin of life
B) nucleic acids cannot replicate without proteins, and proteins cannot be made without nucleic acids
C) early proteins and nucleic acids were very similar to each other
D) proteins and nucleic acids are always present together at the same time