A 回复B的邮件中写道：The price for clothes on basis of FOB GUANGZHOU is USD 10/set,item NO. is 02001, PACKING : 50 sets per carton;total 100 cartons in on 20's container.SHIPMENT: within 35 days of receipt of the L/C. PAYMENT: irrevocable sight L/C. INSURANCE: to be effected against all risks and war risks for 110% of total invoice value. A 的行为属于交易磋商环节中的（）行为。