Why Is It Possible That Canadians Would Suffer a Greater

Multiple Choice

Why is it possible that Canadians would suffer a greater chance of SAD than perhaps someone living in the state of Florida in the USA?

A) Depression is connected to vitamin C,and Florida produces an abundance of oranges; therefore,vitamin C is plentiful.
B) Due to the abundance of sunlight in Florida,the internal clock,the suprachiasmatic nucleus,would not be affected; therefore,SAD would not develop.
C) The long winter nights in Canada increased the production of melatonin,which results in decrease production of serotonin,causing an increase risk of depression.
D) There is no statistical difference regarding the probability of SAD developing more in Canada than in Florida.