What is the difference between the vegetative style and the landscape style of flower arranging?

A. The vegetative style incorporates the techniques of terracing, layering, and clustering, while the landscape style doesn't.
B. The vegetative style features flowers as they're found in nature, while the landscape style resembles a cultivated outdoor garden.
C. Vegetative arrangements group same-season flowers together, while landscape arrangements don't.
D. In vegetative arrangements, the stems within groups are of a uniform height, while in landscape arrangements, they aren't.