Context: When a chemical reaction absorbs or releases thermal energy, the reaction causes a change in temperature. Read the passage about a chemical reaction that absorbs or releases thermal energy. Then, follow the instructions below.
Airbags reduce injuries during car crashes by inflating quickly to provide cushions for people inside a car. Older airbags contain a small amount of sodium azide (NaN3). If a crash occurs, the sodium azide is heated, causing it to break down into sodium metal (Na) and nitrogen gas (N2). In less than one-tenth of a second, enough nitrogen gas is produced to completely fill the airbag. As a result of the reaction, thermal energy is transferred into the surroundings.
Complete the statement.
During this chemical reaction, the airbag becomes ().
A. warmer
B. colder
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

A