Behavior of Volatile Solvent Mixture

Consider a solution containing two volatile solvents: solvent A with a boiling point of 60°C and solvent B with a boiling point of 90°C. When a mixture of these solvents is heated, the vapor above the liquid will be different in composition compared to the liquid phase due to differences in their vapor pressures. According to Raoult's law, the vapor pressure of each component in an ideal solution is proportional to its mole fraction in the liquid phase.

If the boiling point of the mixture is observed to be lower than the boiling point of both pure solvents, which of the following statements is true regarding the behavior of the solution?