Write the next sentence in this paragraph:

How to write a guardianship letter
Check if your state allows guardianship letters.
Not all states recognize guardianship letters. Instead, they require that even temporary custody issues be handled through the courts.

Options are:
[a]. Read your state's laws to find out if guardianship letters are allowed under your state's laws. Guardianship letters usually are mailed with local court documents..
[b]. In almost every states, families must have a guardian or other legal representative, who is usually a first-or third-party authority. When you apply for guardianship letters, your guardian or legal representative will usually restrict the guardianship letter's use, usually no longer than a couple of years..
[c]. The state of maine, for example, requires parents to file papers with a court in order to seek a temporary guardianship. Some states limit informal arrangements, such as those made by letter, to a six month period in order to be effective..
[d]. When you contact your state's court, ask the clerk whether guardianship letters are allowed in most states. If your state does not allow guardianship letters, then consult your state's court for more information..
[c].