Gustaf observes a chemical reaction between two substances in a glass beaker. While observing the reaction, he touches the beaker and notices that it feels warm. Why does the beaker feel warm?
a. The beaker absorbed energy that was released from Gustaf's hand.
b. The beaker released energy that was absorbed by Gustaf's hand.
c. The beaker absorbed energy that was released by the chemical reaction.
d. The beaker released energy that was absorbed by the chemical reaction.
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