In an ecosystem, the average temperature increases, causing a shorter winter. There are two varieties of rabbits in this area, white-furred rabbits and brown-furred rabbits. Which scenario is most likely?
a. Both white- and brown-furred rabbits increase.
b. Both white- and brown-furred rabbits decline.
c. The proportion of white-furred rabbits in the population declines.
d. The proportion of white-furred rabbits in the population increases.