— Hello, this is Wendy. Can I speak to Jessica?

— Yes, _____.[ ]

A. Jessica is me

B. Jessica, please

C. my name is Jessica

D. this is Jessica speaking

甲重金雇用乙杀丙。乙接受雇用并领取相应费用后为杀人做准备，其间得知丙的势力很大，怕遭到报复而放弃杀丙行为，并退还了其领取的费用。甲构成( )。

A．故意杀人罪的预备犯

B．故意杀人罪的既遂犯

C．故意杀人罪的中止犯

D．故意杀人罪的教唆犯