Design criteria. Lot size averaging may be permitted where the Planning Board determines that the resource conservation and/or farmland preservation goals and objectives of the Master Plan are better served by the lot-size-averaging plan than by the conventional plan for development. The applicant shall demonstrate to the Planning Board that the lot-size-averaging plan is clearly preferable to the conventional plan with respect to one or more of the following factors: stream corridor protection, agricultural retention, preservation of forests and woodlands, preservation of habitat for native flora and fauna, protection of scenic views, protection of landmarks, reduction in site disturbance from clearing and grading, reduction in impervious surface, conservation of the site's natural features and topography, and relationship to open spaces on neighboring parcels.