Which two factors are noted as major hindrances to the prefabrication industry?

The correct response highlights the significance of the "Code of Multiplicities and Tradition" as major hindrances to the prefabrication industry. This underscores how traditional practices and building codes can inhibit the widespread adoption and efficiency of prefabricated construction methods.

Building codes often emphasize standardized building practices that can clash with the innovative approaches associated with prefabrication. These codes may not accommodate the uniqueness and design flexibility that prefabricated components can offer. Similarly, traditional construction methods deeply ingrained in the industry can create resistance to change, making it challenging for prefabrication to fully penetrate the market.

In contrast, the other factors focus on various operational and market issues that, while impactful, might not be as fundamental to the adoption of prefabrication as codes and traditions. For instance, while labor issues and transportation delays can affect project timelines, they are often manageable within existing frameworks once a prefabricated system is accepted. Consumer preferences and aesthetic standards can also shape market conditions but do not inherently question the structural and procedural acceptance of prefabrication in the industry.