A small group of large mammals that consisted of closely-related kins migrate into a new ecosystem. Despite inbreeding, the population is stable for many generations. However, due to a sudden appearance of a man-made geographical barrier, the group splits into two smaller groups, $\mathbf{P}$ and $\mathbf{Q}$. The population soon begins to decline within the groups and conservationists decide to take action to increase population of these mammals within the newly divided ecosystems. The most appropriate intervention strategy, from the following options, would be _____ .

• A

  to have separate breeding programs within group $\mathbf{P}$ and group $\mathbf{Q}$
• B

  to create barriers to avoid predators
• C

  to move all the individuals in one group to the location of the other group
• Correct answer
  D

  to create corridors to facilitate migration

Hence, the correct answer is option: 'D'.