下列词语中加点的字的读音，全都正确的一项是         (    )

A．自诩(xǔ)桀骜(ào)抹(mǎ)杀棱(lénɡ)角

B．埋(mái)怨栖(qī)息胚(pēi)胎瞭(1iào)望

C．回溯(sù)勾(ɡōu)当坍圮(pǐ)猝(cù)然

D．亵(xiè)渎隽(juàn)永恪(kè)守详赡(shàn)

Which of the following is NOT one of the conditions that must be met for a trade to be considered an arbitrage()

A. There is no risk. 

B. There are no commissions. 

C. There is no initial investment and there is a guaranteed profit.