Multi-choice problem: Continue writing the next sentence in this paragraph:

How to write a letter of recommendation for a nanny
Check who you're addressing.
Before you begin your letter, know who you're addressing. Most of the time, your nanny will be using your letter of recommendation for many different jobs.

OPT: [-] But sometimes, your nanny may not know what you're required to do if they're not yourself. For example, your nanny might not know a bucket list of state-run nanny jobs if you're a nurse! Choose a subject and time for your letter.. [-] To be sure this is someone you're addressed to, you should check your references. If you've never spoken to your nanny before, find out who you know in real life.. [-] Therefore, something like " dear sir or madam " or " to whom it may concern " is usually appropriate. However, in certain situations you may be addressing someone specific.. [-] You want to ensure that it isn't spam, as it will defeat any job offer that the nanny has received. You can send your letter via email and either print it or mail it to the person you're addressing, using a pen..
Therefore, something like " dear sir or madam " or " to whom it may concern " is usually appropriate. However, in certain situations you may be addressing someone specific.