What is the primary difference in the drive mechanism between the SensorMedics 3100A and 3100B ventilators?

Improved sanitation and clean water have helped control many diseases, such as ________ and ________

Fill in the blank(s) with the appropriate word(s).

The federal government matches state expenditures for:

A) mandatory services. B) state optional services. C) administrative costs. D) all of the above.