Perform MapReduce on this poem [Begin Poem] I sell the best Brandy and Sherry To make all my customers merry, But at times their finances Run short as it chances, And then I feel very sad, very. [End Poem] Question: What is (customers, 1)?
A.
A name-value pair
B.
The number of times the words
C.
The most commonly used words "customer" and "one" were used