Explanation:

- The sentence discusses a situation where the salesman gives into the demands of his boss, suggesting a form of surrender or agreement.

- Option 1 - Conceded: This means to admit or agree to something, usually after initial resistance. It aligns well with "yielded" as both imply giving in.

- Option 2 - Courted: This means to seek the favor, affection, or support of someone. It doesn’t fit the context of giving in.

- Option 3 - Hounded: This means to harass or pursue someone persistently. This doesn't align with the context.

- Option 4 - Trended: This means to have a general direction or tendency. It doesn't relate to the concept of yielding.

- ? Option 1: Conceded is the correct synonym for "yielded."