Answer:
The correct answer is A: WALK
Explanation:
Both of the campus supervisors walk the hall.
In this case, the correct answer is walk, because both of the campus supervisors represent a third person of plural, which is they, so it requires the plural form of the verb.
The verb TO WALK in Present Simple tense conjugates as follows:
1. (I) WALK
2. (You) WALK
3. (He/She/It) WALKS
1. (We) WALK
2. (You) WALK
3. (They) WALK
