Final answer:
Without specific context or information about parking ratios, campus size, and policies, it is not possible to determine how many parking spots PTS manages for a campus of 50,000 people.
Step-by-step explanation:
The question does not provide enough information to determine with certainty how many parking spots PTS manages to service a campus of 50,000 people. Typically, the number of parking spots would be based on factors such as campus size, geographic location, available land, the proportion of commuting students and staff, and parking policies. However, if this question is related to a specific case study, dataset, or university where these ratios are predefined, the exact number of parking spots could become more apparent. Without this context, any choice from A) 5,000 B) 10,000 C) 15,000 D) 20,000 would be speculative. Therefore, I'm unable to confidently select an answer.