There were $$4 \times 4 = 16$$ monkeys in total. After the second whistle, there were $$16 \div 8 = 2$$ monkeys in each row. 
After the trainer\textquotesingle s first whistle, the monkeys at the circus formed $$4$$ rows. There were $$4$$ monkeys in each row. After the second whistle, they rearranged themselves into $$8$$ rows. How many monkeys were there in each row after the second whistle? (2005 Math Kangaroo Problem, Level 3-4, Question \#4) 
A. $$1$$ 
B. $$2$$ 
C. $$3$$ 
D. $$4$$ 
E. $$5$$ 