Final answer:
The trait of alpha project managers that is described in the given options is a. They spend more time on execution than other project managers.
Step-by-step explanation:
Alpha project managers spend more time on execution than other project managers.
Alpha project managers are known for their focus on efficiently and effectively executing projects. They prioritize getting the work done rather than spending excessive time in meetings, sending emails, or engaging in other activities.
This trait is essential for successful project management as it ensures that projects are completed on time, within budget, and meet the desired goals and objectives.