What happen when length of a wire is double by keeping crosssection area uniform​

i have no clue xdxdxdxdxdxd

the answer should be c

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.