You are required to design a 'questionnaire' to be filled on-location by visitors, based on the following objective while writing a report: "To determine the feasibility of setting up a family-oriented vacation resort in the vicinity of a lake destination in the mountains" Which of the following heads would you include in the questionnaire to make it most appropriate for your purpose? 1. Size of family 2. Budget 3. Number of earners in the family 4. Food allergies and dietary restrictions Select the answer using the code given below.

For assessing feasibility of a family-oriented vacation resort, Size of family (1) directly determines room configurations, pricing tiers, and target demographics. Budget (2) is essential to gauge what visitors are willing to spend, which determines viability and price-point design. Food allergies and dietary restrictions (4) inform menu planning and food-service infrastructure — vital for a resort. Number of earners in the family (3) is intrusive private financial data that visitors are unlikely to share on-location and is not directly necessary because budget already captures spending capacity. Hence the appropriate heads are 1, 2 and 4.