Exothermic and endothermic reactions — practice question

Which statement refers to an exothermic reaction?

• AThermal energy is transferred to the surroundings leading to a decrease in the temperature of the surroundings.
• BThermal energy is transferred to the surroundings leading to an increase in the temperature of the surroundings.
• CThermal energy is taken in from the surroundings leading to an increase in the temperature of the surroundings.
• DThermal energy is taken in from the surroundings leading to a decrease in the temperature of the surroundings.