问题如下图：
选项：
A. 
B. 
C. 
解释：
为什么AR growth rate higher than revenue growth rate 是warning sign?
NO.PZ201812100100000702 问题如下 either of Webster’s Notes 4 or 5 about Construction Supply scriaccounting warning sign of potentioverstatement or non-sustainability of operating income? A.No B.Yes, Note 4 provis a warning sign C.Yes, Note 5 provis a warning sign A is correct.Neither Note 4 nor Note 5 provis accounting warning sign of potentioverstatement or non-sustainability of operating income.Increases in operating margins ca warning sign of potentioverstatement or non-sustainability of operating anor net income. In this case, however, operating margins for Construction Supply have been relatively constant ring the last three years.A growth rate in receivables exceeng the growth rate in revenue is accounting warning sign of potentioverstatement or non-sustainability of operating income. In this case, however, Construction Supply’s revenue growth excee the growth rate in receivables.解析Note4和5都不是warning sign。Operating margin如果变高，那么有可能是高估operating income或NI，但是Construction公司的该指标保持稳定。如果应收账款的增长率高于营业收入的增长率，那么有可能operating income被高估或者缺乏持续性，但是Construction公司相反，是收入增长率高于应收账款增长率。 老师，为什么只有“应收账款增长率高于收入增长率”时，可能是报表操纵，反之不是呢？公司更早的确认收入，导致收入增长比应收账款更多，不也是操纵么？
老师能不能一下notes 4和5？
