In which of the following examples of two different brain-injured patients (Tom and Tim) is a "double dissociation" demonstrated?

A) Tom has difficulty with short-term memory tasks, while Tim has difficulty with long-term memory tasks.
B) Tom has impaired language comprehension, while Tim has intact language comprehension but impaired language production.
C) Tom has damage to his left hemisphere, resulting in impaired language abilities, while Tim has damage to his right hemisphere, resulting in impaired spatial abilities.
D) Tom has impaired procedural memory, while Tim has intact procedural memory but impaired declarative memory.