Unlike Snow’s later work on cholera, his research on anesthesia was experimental in nature. What
general skills of experimental design were necessary to plan effective experiments to test dosage
measuring and delivery systems for anesthesia, or to investigate the properties and effects of diff erent
drugs?

It decreases by 4 is your answer mark brainliest 

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source:

Ithink ur answer would be c hope u have a good day: )

Ithink the answer is e