Help the eccentric wizard complete the shipping policies for his online magical potion shop by choosing the correct phrase for each gap.

All fragile potions will be packed carefully in premium dragon-scale bubble wrap. Please note that delivery might be delayed if the courier encounters a grumpy troll on the bridge. Refunds may be requested within thirty days, but only if the potion hasn't already turned you into a toad.

All fragile potions will be packed carefully in premium dragon-scale bubble wrap.

"Will be packed" is the future passive form using the modal "will."

Please note that delivery might be delayed if the courier encounters a grumpy troll on the bridge.

"Might be delayed" expresses a possibility in the passive voice.

Refunds may be requested within thirty days, but only if the potion hasn't already turned you into a toad.

"May be requested" uses the modal "may" to express permission or possibility in the passive voice.