How Trainable Are Mature Workers When the Job Requires Learning

How trainable are mature workers when the job requires learning new computer skills?

A) They are no different from younger workers.
B) They are able to learn those kinds of skills even faster than younger workers.
C) They are able to learn those skills as well as younger workers, but they need more time.
D) They are not able to learn those kinds of skills as well as younger workers.