The reaction between quicklime and water is characterized by:

Quick lime has a chemical formula $\mathrm{CaO}$. It is an amorphous white solid.
Quicklime produces "limelight," a dazzling white light when burned in an oxyhydrogen flame.
A substance known as "soda-lime" is produced when quicklime is mixed with caustic soda ($\mathrm{NaOH}$).
It typically manifests as firm lumps. These lumps dissolve if a small amount of water is applied. A hissing sound and a lot of heat are produced during this process, turning the water into steam. This procedure is known as "slaking of lime," and the resulting fine powder is known as "slaked lime."

When quicklime ($\mathrm{CaO}$) is added to water, it produces the suspension of slaked lime ($\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$) with the evolution of heat. The chemical equation is shown as-

$\mathrm{CaO} \left(\mathrm{s}\right) + {\mathrm{H}}_2\mathrm{O}\to \mathrm{Ca}{\left(\mathrm{OH}\right)}_2 \left(\mathrm{aq}\right) + \mathrm{Heat}$

Thus, the temperature of the mixture changes.

Hence, the correct options are B and C.