Which of the following may have a significant adverse impact upon the successful completion of an international project? (Select THREE).

Time zones create scheduling and communication challenges because team members in different regions may have limited overlapping working hours, slowing decision-making and coordination.

Travel costs are significantly higher in international projects due to long-distance flights, lodging, and logistics, which can strain the project budget and limit resource availability.

Co-location of resources improves collaboration and communication, making it a benefit rather than an adverse impact on project completion.

A project plan is a tool that guides project execution and is not a factor that adversely impacts project completion.

Scheduled vacations affect any project regardless of whether it is international and are managed through standard resource planning, making them not uniquely significant to international projects.

Language barriers can cause miscommunication, misinterpretation of requirements, and documentation errors, all of which can derail international project success.