Assertion: The supreme court "ordered a ban on registration of private non-commercial vehicles without Euro II emission norms in the national capital region (NCR) from April 1, 2000, to control the growing pollution". RI. The rate of pollution now has become a threat to human life. RII. So far, private non-commercial vehicles have been registered without Euro II emission norms in the NCR.

• A. Only RI and not RII is the reason for the assertion.
• B. only RII and not RI is the reason for the assertion.
• C. either RI or RII, but not both, is the reason for the assertion.
• D. neither RI nor RII is the reason for the assertion.