I'd go with option B. Offering to mail the customer a user manual could be really helpful, especially if the incident was related to some product or service they're using.
Option C seems like the obvious choice here. Sending written confirmation of the incident closure is a great way to ensure the customer has a record of the resolution.
Claudio
17 days agoClare
1 days agoArlette
25 days agoVallie
2 days agoLaquita
11 days agoCoral
13 days agoArgelia
27 days agoMichel
29 days agoDetra
1 months ago