Final answer:
To ensure security of cash receipt resources, the primary control goal is met by immediately endorsing incoming checks as it prevents unauthorized use. Other controls are important for different aspects of cash management but do not primarily secure the resources.
Step-by-step explanation:
Among the control plans for the cash receipts function, the primary control goal of ensuring the security of resources is best achieved by the option c. immediately endorse incoming checks. Immediate endorsement provides a form of protection by linking the check to a specific bank account, which deters theft or misappropriation since it is less likely an endorsed check can be cashed or deposited by unauthorized persons. This practice serves as an effective internal control mechanism in accounting and helps to prevent the misuse of funds.Reconciling the bank account regularly is important for financial management and preventing errors, but it is more of a detective control, identifying issues after the fact. Entering cash receipts close to where cash is received can help in accuracy and timeliness, and one-to-one checking of deposit slips and checks ensures that what was reported as received was actually deposited but neither directly prevents theft or misappropriation of resources.