Objective: How to make Blackberry tarts.

Which of the following solutions is more sound in terms of naive physics reasoning?

Available options: a). Place 1/4 cup Blackberry thorns, 1/4 cup sugar in unbaked tart shell, bake for 18 min. in 375 degree oven, check and remove when shell brown. b). Place 1/4 cup Blackberries, 1/4 cup sugar in unbaked tart shell, bake for 18 min. in 375 degree oven, check and remove when shell brown.
b).