Need help please ...It's urgentabout quote textual evidence to support the inference. Thank you. Read the passage below.

How do Alaskans handle living in the darkness for so long? Many people adjust their lifestyles so that they can keep healthy. For example, they try to get used to starting their days in complete darkness and staying up long past sunset.
Sunlight is important to our bodies. We need it to make vitamin D. It also helps our mood. Many Alaskans take vitamin D supplements and have special lamps that provide sun-like light. They also keep as active as possible.
One of the best ways to cope with darkness is to be even more active during the summer. Summers bring up to 24 hours of visible light. During this time, Alaskans spend a lot of time outside enjoying nature. They soak up as much sunlight as possible and try to keep it in reserve for the winter.

Which quote from the text does not support the inference that living in Alaska can be a challenge?

a) "Many Alaskans take vitamin D supplements and have special lamps that provide sun-like light."
b) "Many people adjust their lifestyles so that they can… get used to starting their days in complete darkness and staying up long past sunset."
c) "During this time, Alaskans spend a lot of time outside enjoying nature."
d)"Summers bring up to 24 hours of visible light. Alaskans… soak up as much sunlight as possible and try to keep it in reserve for the winter."