URGENT PLEASE HELP ME, HOW DO I DO THIS QUESTION?

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.  

the answer would be a

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.