Knowing that "each of the moon 's phases usually occurs once per month", how would one answer "A full moon and a crescent moon occur normally"

OPTIONS:
- every two fortnights
- every week
- yearly
- every evening
every two fortnights
Hur skulle man svara "En fullmåne och en månskära inträffar normalt": - varannan fjortondagarsperiod - varje vecka - varje kväll
How would you answer "A full moon and a moon crescent occur normally": - every two fortnight - every week - every night
Varannan fjortonde dag
Every other 14 days