Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to block a call [title] Call your telephone service provider. [step] Ask a customer service representative whether call blocking is an available feature. [substeps] If call blocking is available, request that it be activated.

Ending1: The internet service provider can log in as an active employee to allow a number of calls to be blocked. [title] Display your number and number displayed on the call box. Ending2: If any voice communications with the recipient is leaving unapproved or disabled, a state toll-free number may be enabled. If you use a cell phone service provider, skip this section. Ending3: This will keep the service company in the loop of your call. If call blocking does not work, you can call your service provider from a telephone and ask. Ending4: There may be a monthly fee for using the call blocking feature. Most telephone service providers offer a variety of call blocking services, though blocking specific numbers may not be an option.

Answer format: ending1/ending2/ending3/ending4