请问不选A的原因是因为A没有短期的吗？

NO.PZ2018120301000029 问题如下 Mollyexplains that, in orr to evaluate the asset allocation process, fixeincomeportfolios shoulhave appropriate benchmark. Leasks for benchmark aiceregarng C’s portfolio of short-term anintermeate-term bon, allnominatein US llars. Molly presents three possible benchmarks inExhibit 2.Basen C’s bonholngs anExhibit 2, Molly shoulrecommen A.Benchmark 1. B.Benchmark 2. C.Benchmark 3. CorreAnswer: is correct. C htwo types of assets, short term anintermeate term. For the short-term assets, a benchmark with a short ration is appropriate. For the intermeate-term assets, a benchmark with a longer ration is appropriate.In this situation, C mwish to combine severwell-finesub-benchmark categories into overall blenbenchmark (Benchmark 2). The Bloomberg Barclays Short-Term Treasury Inx is appropriate benchmark for the short-term assets, anSR uses a 50% weight for this component. The longer-ration Bloomberg Barclays US Corporate BonInx is appropriate benchmark for the intermeate-term assets, anSR uses a 50% weight for this component. a result, Molly shoulrecommenproposeBenchmark 2. 选择benchmark从ration和cret两个角度，但是文中提问只给了较小信息无法进行知识的关联。