The idea of making sueh a clock was developed by a

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The ClockThat Wake Yozf When You Are Ready 　　Are you a teal grump(脾气坏的人)in the mOITIingsDo you wake up every day feeling tired，angry aJld up8et，and all too ready to flit the Snooze(瞌睡)buttonIf so，then a new alarnl clock COilld be just for you．The c10ck，called S1eepSmart，measures your sleep cycle，and waits for you t0 be in your lightest phase of sleep before waking you up，Its makers say that should ensure you wake up feeling refreshed(恢复精力) every moiTling．　　As you sleep you paSS through a sequence of aleep states—light sleep，deep sleep and REM sleep(快速眼动睡眼)一that repeats approximately every 90 minutes．The points in that cycle at which you wakeear affect hOW you feellater，aJld may even have a greater impact th．衄hOW 10ng or little you have slept．Being wakened during a light phase means you are more 1ikely t0 wake up cheefful and full 0f life and interest．　　SleepSmart records the distinct pattern 0f bmin waves pmdueed during each phase of sleep，Via a head baJld equipped with electrodes(电极)and a mieroprocessor．This measures electric actiVity of the weare’s brain，and eommunicates wirelessly with a clock unit near the bed．You program the clock with the latest time at which vou Wallt t0 be wakened，and it then at the pIDper time wakes you during the 1ast light sleep phase before that．　　The concept was invented by a group 0f students at Brown Universl‘ty in Rhode Island after a friend complained 0f waking up tired and performing p00dy on a test“As sleep—depriVed(剥夺)people ourselves，we started thinking of what t0 do about it，’’says Eric Shashoua，a recent coUege graduate and now chief executive officer 0f Axon Sleep Research Laboratories，a company created by the students to develop their idea．They have almost finished a prototype and plan to market the product by next yeat"

The idea of making sueh a clock was developed by a group of．

A．students at Brown Universily．
B．teachers at Brown University．
C．sleep—deprived scientists．
D．forifler engineers at Axon Sleep Research Laboratories．