The correct answer is: A. Crash time
Crash time is the shortest possible time to complete an activity, but it requires additional resources and costs.
Normal time is the estimated time to complete an activity under normal conditions.
Optimistic time is the shortest possible time to complete an activity, assuming everything goes perfectly.
Standard time is the most likely time to complete an activity.
Here is a table that summarizes the key differences between the four types of time:
| Type of time | Definition |
|—|—|
| Crash time | The shortest possible time to complete an activity, but it requires additional resources and costs. |
| Normal time | The estimated time to complete an activity under normal conditions. |
| Optimistic time | The shortest possible time to complete an activity, assuming everything goes perfectly. |
| Standard time | The most likely time to complete an activity. |
I hope this helps! Let me know if you have any other questions.