Granting Time Extensions:
* Differing site conditions are excusable delays under standard contract terms, requiring time extensions.
* Centrifuge delays and shop drawings typically fall under the contractor's responsibility and are not excusable.
Excluded Options:
* A & B: Shop drawing-related delays are the contractor's risk unless explicitly agreed otherwise.
* D: Combining excusable and non-excusable delays does not entitle an extension.
Verification with PSP Guidelines:Granting time extensions aligns with contractual principles outlined in PSP-related contracts (Ref: PSP Study Guide, Chapter 1C: Delay Analysis and Claims).