How is penicillin used?
a to make bread rise

b to kill protists that cause disease

c to make cheese

d to kill bacteria that cause disease

the answer is d

Explanation:

They attack the disease process by destroying the structure of the bacteria or their ability to divide or reproduce. Scientists often categorize antibacterials in the following way: Some antibacterials (eg, penicillin, cephalosporin) kill bacteria outright and are called bactericidal.

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

what type of charge does it have? negative