Answer:
July.
Step-by-step explanation:
Revenue should be recognize when earned. The services were provided o July, so are earned in July.
During June, the customer can cancel the order. The company should not recognize yet. It has to be conservative.
Under cash basis, the services will be recognize on August which, is the payment date. But, on recognition principle we should use accrual basis. The business provide services on July afterwhich it can claim to the customer the amount therefore, it is a realziable gain.