Q1. In MapReduce programming, what is the output of the Reduce function? A. It doesn't generate any output ever B. Key-value pairs C. It is arbitrary and depends on the programmer Q2.How are key-value pairs distributed between reduce functions in different computing nodes? A. A reduce function may receive pairs with different keys and values at once B. All pairs with the same key are sent to one reduce function C. All pairs with a same value are sent to one reduce function