I wonder if Henry will come to the party at 8:00 sharp as he's promised. （）

A.The party won‘t start until 8:00.

B.Thank you for having the party for me.

C.Don‘t worry. He always keeps his word.

D.The party must cost a lot.

有关三倍体无籽西瓜的说法正确的是（）

A.三倍体西瓜因为不可育，所以该变异属于不可遗传变异

B.三倍体西瓜与二倍体相比，果实大、含糖量高，但抗逆性降低

C.三倍体西瓜的培育过程中需要用到生长素诱导多倍体形成

D.三倍体西瓜培育过程中需用二倍体西瓜的花粉刺激三倍体植株雌花，使其子房发育成果实