Kiera is building a new computer and wants to make sure she has an adequate power supply for all the new components she is purchasing. She will be installing three HDDs$,$ with each using $25$ watts. The processor she is using will need $125$ watts. The motherboard will use $80$ watts. RAM will require $3$ watts for each of the four DDR$3$ DIMM modules. Her video card will need $400$ watts to run at the maximum level. She wants to keep the cost as low as possible for the power supply.

Which power supply would you recommend?

a$.$

$600$W power supply

b$.$

$700$W power supply

c$.$

$800$W power supply

d$.$

$900$W power supply