Step 1 — Read the full sentence with all parts:
(a) When assertion is used with the win-win approach
(b) and with others who also uses the win-win approach
(c) each party can consider the needs of the other and
(d) move towards a solution that satisfies as many needs as possible
Step 2 — Focus on subject-verb agreement:
- In part (b), the subject is "others," which is plural.
- The verb that follows should also be plural: "use."
- However, the phrase incorrectly says "others who also uses," which is grammatically wrong because "uses" is singular.
Step 3 — Correct form:
The correct phrase should be: "and with others who also use the win-win approach."
Step 4 — Conclusion:
The error lies in part (b), where the verb form does not agree with the plural subject "others."
Final Answer:
The correct option is (B) : b.