A _______ to a problem is a way of dealing with it so that the difficulty is solved.
A:reason
B:solution
C:vocation
你能想象一棵苹果树上长出三种不同口味的苹果吗?一种开白花的植株上同时开出白花、红花、紫花吗?运用生物技术就可以做到,这种技术是( )