Final answer:
If one task can only be completed after another task has been executed, it means that the tasks are dependent on each other and will be executed sequentially. Option d) is the correct answer.
Step-by-step explanation:
If one task can only be completed after another task has been executed, this means that the tasks are dependent on each other. Option d) is the correct answer. When one task is dependent on another, it means that the second task cannot start until the first one is finished. This dependency ensures that the tasks are executed in a specific order, known as sequential execution.
The correct answer to the students question is that the one task is dependent on the other, leading to sequential execution of tasks. Other options do not directly relate to the context of task dependency and sequential execution.
If one task can only be completed after another task has been executed, we can deduce that these tasks exhibit a form of dependency where the execution of the second task is contingent on the completion of the first. This type of relationship is best described by option (d) - the one task is dependent on the other. In terms of scheduling and execution, these tasks will indeed be executed sequentially, one after the other, thus exhibiting a type of concurrency constraint.
The statement about the sum of time taken to complete tasks that would otherwise happen in parallel does not directly apply to this scenario since we are discussing tasks that must occur sequentially due to a dependency. Therefore, the options mentioning individual performance evaluation or the easiness of the task (a. and b.) are not relevant answers to the question presented. The correct answer to the question is that the tasks are dependent on each other, and they will be executed sequentially.