Which of the Following Is True About Mobility Across Employers

Which of the following is true about mobility across employers?

A) The pension system's incentives should not be modified regardless of the mobility.
B) Reduced mobility reinforces the trend toward defined contribution plans.
C) Ease of transfer of funds will tighten with increase in mobility.
D) Increased mobility will bring down portability across the employees.
E) Penalties for mobility may require modification with mobility across employers becoming desirable.