Final answer:
Hydrogen (H) would be generated most easily by hydrogen abstraction due to its relatively low bond dissociation energy and high reactivity as a radical. The correct option is c.
Step-by-step explanation:
(c) H would be generated most easily by hydrogen abstraction. Hydrogen atoms are easily abstracted due to their relatively low bond dissociation energy. When a hydrogen atom is abstracted from a molecule, it forms a radical by leaving behind an unpaired electron. This radical is highly reactive, making it easier to generate by hydrogen abstraction compared to other elements. Hence, c is the correct option.