Final answer:
The activity which is fourth on the list is option A). A
Step-by-step explanation:
According to the given information, budget task A must be completed before budget task B.
Therefore, budget task A will be the first task on the list.
Budget task C must be completed before budget task A, so it will be the second task on the list.
Budget task B will be the third task on the list as it follows after budget task A.
Accounting report L must be submitted before accounting report K, which means it will be completed first.
Accounting report K must be submitted after budget task A, which means it will be completed fourth.
Therefore, the fourth task on the list is budget task A.