निम्नलिखित में से कौन सा यूनिवर्सल डिज़ाइन ऑफ़ लर्निंग (UDL) का मूल सिद्धांत नहीं है?

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): 'Universal Design for Learning' (UDL) is a framework that advocates designing curriculum and instruction to be accessible to all learners from the outset. Reason (R): UDL focuses exclusively on learners with physical disabilities and does not address cognitive or learning differences.

Why is clear goal definition critical according to Universal Design for Learning (UDL) guidelines?