Final answer:
The responsibility of the second baseman in a base hit into the left/center field gap is to cover second base for a possible force out. Hence the correct answer is option A
Step-by-step explanation:
The responsibility of the second baseman in the given scenario would be to cover second base for a possible force out.
When a base hit is made into the left/center field gap, it is common for the second baseman to move towards second base to be in position to receive a throw from the outfield, should the ball be returned to the infield. This allows the second baseman to potentially force out a runner at second base, if they are attempting to advance.
If the ball is hit to the left side of the field and the first baseman is unable to make a play, the second baseman may also have to cover first base, but this is less common for a hit into the left/center field gap.
Hence the correct answer is option A