Scientists in a laboratory were working with insulin, a protein often used to treat diabetes. They left two identical vials or insulin in different places. This table shows how the temperature of each vial changed over 15 minutes.
Vial in the refrigerator
Initial temperature (*C) 2.2
Final temperature (*C) 3.2
Vial on the counter
Initial temperature (*C) 2.2
Final temperature (*C) 4.5
During this time, thermal energy was transferred from ____ to _____
A. Each vial . . . the surroundings
B. The surroundings . . . each vial