I tried this problem and got A, what did I do wrong?

Topic: Revealed Preference Difficulty: 2 % Correct Responses: 0 Discrimination Index : 0 Correct Answer: B 7.2 Remember that the Laspeyres price index uses the old quantities for the weights. In 1971, good r cost 5 and good y cost 1. The current price of good r is 7 and the current price of good y is 6. In 1971 the consumption bundle was (x, y) = (2, 4). The current consumption bundle is (c, y) = (5, 3). The Laspeyres index of current prices relative to 1971 prices is closest to which of the following numbers? (a ) 3.79 (b) 2.71 (c) 0.26 (d) 1.89 (e) 1.26