Explanation:
The substance A and B will mix into one solution as it is a solvent interactions which is greater than or equal to the solute- solute and the solvent-solvent interactions. Thus when such interactions occurs, it is greater or equal to the some of the other two possible interactions. And here both have the same kind of interaction, and same magnitude, so they will makes to form a solution and mixes properly and spontaneously.
Convergent plates slowly come together, and over an amount of time, push together, and one either submerges, or they both buckle. Either way can form a mountain, because either way raises land up to the point where it eventually forms mountains.
Answer:
B.the reaction is spontaneous
