A workshop is a technique for conducting group discussions and activities with stakeholders to elicit, analyse, validate and prioritise their views and needs. It helps to facilitate effective communication and collaboration among stakeholders and resolve conflicts or issues. Therefore, option D is the correct answer, as a workshop would help the business analyst to resolve the conflict and gain a consensus among stakeholders who have different views after individual interviews. A workshop would help to bring together the conflicting stakeholders in one place and time and enable them to share and compare their views openly and constructively. A workshop would help to identify and address the sources and reasons of the conflict and find common ground and mutual understanding among stakeholders. A workshop would help to generate and evaluate different options or solutions that satisfy all or most of the stakeholder views and agree on the best one for further development and implementation. Option A is not a correct answer, as scenario analysis is not a technique for resolving conflict and gaining consensus among stakeholders who have different views after individual interviews. Scenario analysis is a technique for exploring how different scenarios or situations could affect the outcomes or impacts of an organisation or project. It helps to test the feasibility and desirability of different options or solutions under various circumstances or assumptions. Option B is not a correct answer, as questionnaire is not a technique for resolving conflict and gaining consensus among stakeholders who have different views after individual interviews. Questionnaire is a technique for collecting information from stakeholders by asking them predefined questions in written form. It helps to elicit quantitative or qualitative data from a large number of stakeholders in an efficient and consistent way. Option C is not a correct answer, as observation is not a technique for resolving conflict and gaining consensus among stakeholders who have different views after individual interviews. Observation is a technique for gathering information from stakeholders by watching them perform their tasks or activities in their natural environment. It helps to analyse how stakeholders work in practice and identify their implicit or tacit needs.