Final answer:
Solving new problems is an example of fluid intelligence during middle adulthood, as it involves the capacity to reason and solve novel problems, contrary to using past knowledge or recalling information. The correct option is a.
Step-by-step explanation:
The example of fluid intelligence experienced during middle adulthood from the given options is a. Solving new problems. Fluid intelligence refers to the capacity to reason and solve novel problems, independent of any knowledge from the past.
This includes the ability to identify patterns, comprehend new concepts, and develop new strategies for problem-solving when faced with new and unfamiliar situations.
Option b, Repeating techniques that worked in the past, reflects crystallized intelligence, which involves using experience and knowledge that has already been acquired.
Option c, Knowing at what temperature a steak is well done, and option d, Recalling the Most Valuable Player (MVP) of a previous Super Bowl game, also relate to crystallized intelligence, as they involve recalling facts and learned information.
Therefore, the correct action that reflects an example of fluid intelligence during middle adulthood is Solving new problems. The correct option is a.