Which of the following is NOT considered a quantitatively measurable unit of service?

What is a water-reactive substance?

a. A substance that suffers no chemical reaction with water but is likely to become spontaneously flammable, emit flammable or toxic gases, or generate sufficient heat to self-ignite or cause the ignition of nearby combustible materials b. A substance that, by its chemical reaction with water, is likely to become spontaneously flammable, emit flammable or toxic gases, or generate sufficient heat to self-ignite or cause the ignition of nearby combustible materials c. Any material that is hydrated beyond saturation d. A material that must be stored in a moist atmosphere or it is likely to become spontaneously flammable, emit flammable or toxic gases, or generate sufficient heat to self-ignite or cause the ignition of nearby combustible materials

By what stage of pregnancy should restorative treatment be completed on a pregnant woman?

A) Preconception B) First trimester C) Second trimester D) Third trimester