50 points

read this passage from "suited for spacewalking," a nasa puication. what is true about the main idea of the paragraph?

when designing spacesuits, it is important to account for the temperature range of the environment for which the suit is intended. heating and cooling systems inside a suit can moderate temperatures, but electric power to operate these systems limits the length of time the suit can be used before recharging. one way to reduce dependency of a spacesuit heating/cooling systems is to use materials for suit construction that have desirable thermal properties. if, for example, a suit is operated in a very cold environment, good insulating material will reduce the need for internal suit heating.

a - the main idea is implied - heating a cooking systems in spacesuits use too much electricity

b - the main idea is implied - nasa needs to develop a way to regulate temperature in space.

c - the main idea is stated - a suit needs to be designed for temperature range it will be used in

d - the main idea is stated: spacesuits are worn in cold environments and need to be insulated