At the beginning of the school year, each student in a math class reaches into one of four bags of gifts and pulls out one gift. Each of the four bags, A, B, C, and D, has some calculators and some notebooks. Sal hopes he pulls out a calculator. The table shows the number of calculators and notebooks that have been pulled out from each bag so far. Number of Calculators Number of Notebooks Bag A 18 18 Bag B 30 20 Bag C 21 9 Bag D 13 20 Based on the data in the table, which bag should Sal choose and why? Select your answers from the drop-down lists. Sal should choose bag because the relative frequency of pulling a calculator out of this bag is . The relative frequency is .