A student who is studying atomic reactions creates the following Venn diagram.

Circle 1: Reaction A
-Involves Reactions
-Happens outside atomic nucleus
-Releases relatively small amounts of energy

Circle 2: Reaction B
-Involves neutrons
-Happens inside atomic nucleus
-Releases relatively large amounts of energy

How should the student label each circle in this diagram?

A. reaction A: chemical; reaction B: nuclear
B. reaction A: nuclear; reaction B: chemical
C. reaction A: strong nuclear; reaction B: weak nuclear
D. reaction A: weak nuclear; reaction B: strong nuclear