下列能用同一原理解释的是

A．SO₂、Cl₂都能使品红溶液褪色

B．NH₄Cl晶体、固体碘受热都会汽化

C．福尔马林、葡萄糖与新制Cu(OH)₂共热都有红色沉淀生成

D．苯、乙烯都能使溴水褪色

Many college graduates are willing to start online shops to get over the period ________ they have difficulty finding a satisfactory job.

A．where

B．when

C．which

D．that