There are two varieties in a population of squirrels, short tails and long tails, long tail squirrels are better at jumping and balancing in trees, scientist observed that over the span of 100 years the proportion of the population with long tails increase from 10% to 60% which statement is most likely
A the proportion of squirrels may have increased due to increased food availability
B the proportion of long tail, squirrels may have increased due to a decreased in trees
C the proportion of short tails, squirrels may have decreased due to decreased food availability
D the proportion of short tails, squirrels may have decreased due to an increase in trees