What Type of Fruit is a Blackberry

Question

What type of fruit is a blackberry?  
A) An aggregate of many drupes
B) An aggregate of many indehiscent fruits
C) An aggregate of many small berries
D) A multiple of small berries
E) A multiple of small pomes

Accepted Answer

Blackberry is an aggregate fruit composed of many smaller drupelets. Each drupelet contains a seed, and the whole cluster of drupelets is then contained within a fleshy receptacle.