Option C is correct because the requirement is strict enforcement. Salesforce Help for Sample Limit Template types states that when the enforcement type is Error, distributions are blocked after limits are met. This directly matches the legal requirement in the question: the field sales rep must be prevented from submitting the visit when the disbursement quantity exceeds the allowed limit.

A controlled substance requires a hard compliance stop rather than a soft business warning. Setting the Limit Enforcement Type to Error ensures that the rep receives an error message and must correct the sample quantity before continuing. This protects the company from noncompliant disbursements and supports controlled sampling governance.

Option A is incorrect because Warning is a soft-limit behavior. A warning may alert the rep that the limit has been exceeded, but it allows the rep to proceed. That does not meet the requirement to strictly prevent the transaction. Option B is also not the best answer because “Block” is not the documented Limit Enforcement Type in the sample-limit template options shown in Salesforce’s Life Sciences sample limit resources. The documented strict enforcement behavior is Error. Therefore, for controlled substances or any legally required hard stop, the consultant should configure the Sample Limit Template with Limit Enforcement Type set to Error.