What happens when the Gibbs free energy associated with an equilibrium
reaction is negative?

What is a property of a double replacement reaction

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Ab c or d ? i’m not sure what the answer is