Final answer:
More game is present now compared to the early 1900s due to improved habitat management, including conservation efforts and stricter hunting regulations, which have led to wildlife population rebounds.
Step-by-step explanation:
The reason we have more game now than in the early 1900s is most accurately attributed to B) Improved habitat management. Throughout the 20th century, conservation efforts, including the establishment of wildlife reserves, game laws, and habitat restoration initiatives, have led to a rebound in many wildlife populations that were previously on the decline due to overhunting and habitat destruction. Causes such as increased hunting, climate change, and decreased human population are not consistent with the increases in game populations we've seen; in fact, hunting regulations have become stricter, human populations have grown, and climate change often poses challenges for biodiversity.